v. + operation >>共 566
have 6.25%
suspend 3.32%
resume 2.96%
begin 2.89%
undergo 2.40%
expand 2.34%
launch 2.22%
perform 2.04%
conduct 1.92%
run 1.88%
undergo + n. >>共 573
surgery 38.13%
treatment 9.83%
test 6.70%
operation 3.34%
change 3.27%
chemotherapy 1.80%
therapy 1.51%
training 1.49%
procedure 1.32%
repair 1.12%
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