reap vs separate

reap

verb
  • To cut (for example a grain) with a sickle, scythe, or reaping machine 

  • To terminate a child process that has previously exited, thereby removing it from the process table. 

  • To gather (e.g. a harvest) by cutting. 

  • To obtain or receive as a reward, in a good or a bad sense. 

noun
  • A bundle of grain; a handful of grain laid down by the reaper as it is cut. 

separate

verb
  • To divide itself into separate pieces or substances. 

  • To disunite from a group or mass; to disconnect. 

  • To divide (a thing) into separate parts. 

  • To cause (things or people) to be separate. 

adj
  • Apart from (the rest); not connected to or attached to (anything else). 

  • Not together (with); not united (to). 

noun
  • A printing of an article from a periodical as its own distinct publication and distributed independently, often with different page numbers. 

  • Anything that is sold by itself, especially articles of clothing such as blouses, skirts, jackets, and pants. 

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