The verbs in this list were collected from a corpus of approximately 100,000 words of technical orders for the maintenance of F-16 aircraft. The text was tokenized into words and the words were then annotated for grammatical category using a statistical part-of-speech tagger trained on instruction-genre materials from the Penn Treebank part-of-speech-tagged corpus. A morphological analysis on verbs was then performed, utilizing on-line dictionaries to identify the root forms of inflected verb tokens. The verb roots were then sorted by frequency of occurrence in the text. The counts for verb frequency do not include the occurrences of verbs in verb-particle constructions and adjectival predicates such as "turn off" and "be free of". Such constructions were identified semi-automatically by a collocational analysis of word n-grams with n set between 2 and 10 words. These instances of the verbs are counted separately. For example, of the 41 occurrences of the verb root "turn", 6 were cases where the verb was part of the verb-particle construction "turn off". Hence, in the counts below, "turn" is listed as occurring 35 times in isolation, and "turn off" is listed as occurring 6 times.
770 remove 646 install 536 note 452 position 340 require 276 torque 218 disconnect 210 use 197 connect 164 lubricate 160 perform 148 refuel 136 close 135 prevent 130 discard 128 omit 119 allow 108 open 87 follow 85 apply 80 verify 80 retain 75 move 75 engage 72 recommend 71 operate 70 secure 69 slide 68 purge 67 tighten 65 have 65 cool 64 match 61 seal 60 clamp 59 inspect 59 drain 57 rotate 53 check 51 result 50 outline 47 reinstall 47 indicate 47 give 44 prepare 41 be_open 41 act 40 assist 39 depress 38 defuel 35 turn 34 be_similar 33 compress 32 align 31 safety-wire 31 depressurize 30 stop 30 couple 30 adjust 29 provide 28 come_on 27 latch 27 increase 27 go_out 26 comply 23 slow 23 push 22 place 21 remain 21 lift 21 exceed 20 proceed 20 loosen 20 coordinate 19 insure 19 cause 18 start 18 insert 17 oscillate 17 occur 17 accomplish 16 wipe 16 list 16 fuel 16 attach 16 approve 14 replace 14 obtain 14 identify 14 contain 14 be_identical 13 release 13 mount 13 maintain 13 extend 13 avoid 12 lock 12 hold 12 clean 12 be_free_of 12 add 11 tag 11 service 11 press 11 fit 11 begin 10 reposition 10 read 10 facilitate 10 collect 10 affect 9 work 9 take 9 point 9 pass 9 move_off 9 feel 9 exist 9 detect 9 decrease 9 continue 9 conceal 8 separate 8 locate 8 disengage 8 damage 8 be_present 7 touch 7 repeat 7 pack 7 observe 7 change 6 wash 6 turn_off 6 retorque 6 limit 6 leave 6 insulate 6 illustrate 6 hear 6 grind 6 evaporate 6 determine 6 crisscross 6 come 6 bleed 6 be_clear 5 support 5 seat 5 restrict 5 permit 5 fold 5 flow 5 equip 5 disturb 5 associate 4 unfold 4 trap 4 test 4 spray 4 short 4 scratch 4 reduce 4 magnify 4 instruct 4 form 4 force 4 fill 4 fail 4 eject 4 define 4 control 4 cease 4 break 4 be_serviceable 4 be_applicable 3 wear 3 utilize 3 uncover 3 tee 3 spill 3 shut_off 3 shade 3 seek 3 saturate 3 return 3 rest 3 preclude 3 necessitate 3 monitor 3 mate 3 make 3 key 3 impregnate 3 evacuate 3 enter 3 eliminate 3 dry 3 drop 3 discharge 3 direct 3 designate 3 consist 3 consider 3 chock 3 blow 3 bend 3 be_visible 3 be_low 3 be_familiar_with 3 be_dangerous 3 be_alert_for 3 be_acceptable 3 back_off 3 attempt 3 actuate 2 unlock 2 transfer 2 trail 2 terminate 2 switch 2 stabilize 2 speak 2 simulate 2 show 2 shorten 2 shim 2 select 2 satisfy 2 refer 2 raise 2 pump 2 pull_out 2 propel 2 overcome 2 measure 2 lengthen 2 inhibit 2 float 2 find 2 face 2 entrain 2 disseminate 2 delete 2 deform 2 cut 2 code 2 bind 2 become 2 be_full 2 be_flush_with 2 assemble 2 appear 2 amend 1 wait 1 vibrate 1 vent 1 uncouple 1 supply 1 supersede 1 submit 1 stick 1 spline 1 splice 1 smear 1 slit 1 signify 1 shrink 1 sense 1 see 1 rise 1 retract 1 reset 1 report 1 reclean 1 receive 1 reaccomplishe 1 pull 1 pressurize 1 present 1 paint 1 notice 1 need 1 miss 1 minimize 1 mark 1 load 1 line 1 lead 1 keep 1 interfere 1 integrate 1 include 1 fit 1 exposee 1 escape 1 engage 1 end 1 empty 1 distribute 1 display 1 describe 1 depend 1 deactuate 1 cure 1 crush 1 cross-reference 1 create 1 cover 1 configure 1 concern 1 clear 1 center 1 cap 1 bypass 1 bond 1 bear 1 assure 1 assume 1 assign 1 achieve 1 accept