fail vs operate

fail

verb
  • Not to achieve a particular stated goal. (Usage note: The direct object of this word is usually an infinitive.) 

  • To become unable to meet one's engagements; especially, to be unable to pay one's debts or discharge one's business obligation; to become bankrupt or insolvent. 

  • To receive one or more non-passing grades in academic pursuits. 

  • To give a student a non-passing grade in an academic endeavour. 

  • To be wanting to, to be insufficient for, to disappoint, to desert; to disappoint one's expectations. 

  • To be wanting; to fall short; to be or become deficient in any measure or degree up to total absence. 

  • To neglect. 

  • To be unsuccessful. 

  • Of a machine, etc.: to cease to operate correctly. 

adj
  • Unsuccessful; inadequate; unacceptable in some way. 

noun
  • A failure, especially of a financial transaction (a termination of an action). 

  • A failure (condition of being unsuccessful). 

  • A failing grade in an academic examination. 

  • Poor quality; substandard workmanship. 

  • A failure (something incapable of success). 

  • A piece of turf cut from grassland. 

operate

verb
  • To perform a work or labour; to exert power or strength, physical or mechanical; to act. 

  • To deal in stocks or any commodity with a view to speculative profits. 

  • To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc. 

  • To act or produce effect on the mind; to exert moral power or influence. 

  • To produce, as an effect; to cause. 

  • To produce an appropriate physical effect; to issue in the result designed by nature; especially (medicine) to take appropriate effect on the human system. 

  • To put into, or to continue in, operation or activity; to work. 

How often have the words fail and operate occurred in a corpus of books? (source: Google Ngram Viewer )