exert vs function

exert

verb
  • To put in vigorous action. 

  • To make use of, to apply, especially of something non-material. 

function

verb
  • To carry out a function; to be in action. 

  • To have a function. 

noun
  • What something does or is used for. 

  • The physiological activity of an organ or body part. 

  • A routine that receives zero or more arguments and may return a result. 

  • The role of a social practice in the continued existence of the group. 

  • An official or social occasion. 

  • A party. 

  • The characteristic behavior of a chemical compound. 

  • A relation in which each element of the domain is associated with exactly one element of the codomain. 

  • A professional or official position. 

  • A relation where one thing is dependent on another for its existence, value, or significance. 

  • Something which is dependent on or stems from another thing; a result or concomitant. 

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