include vs knock off

include

verb
  • To use a directive that allows the use of source code from another file. 

  • To consider as part of something; to comprehend. 

  • To bring into a group, class, set, or total as a (new) part or member. 

noun
  • A piece of source code or other content that is dynamically retrieved for inclusion in another item. 

knock off

verb
  • To make a copy of, as of a design. 

  • To rob. 

  • To defeat. 

  • To halt one's work or other activity. 

  • To have sex with. 

  • To remove, as a discount or estimate. 

  • To assign (an item) to a bidder at an auction, indicated by knocking on the counter. 

  • To remove by hitting (something, someone) 

  • To kill. 

  • To accomplish hastily. 

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