glean vs reap

glean

verb
  • To gather what is left in (a field or vineyard). 

  • To collect what is left behind (grain, grapes, etc.) after the main harvest or gathering. 

  • To gather information in small amounts, with implied difficulty, bit by bit. 

  • To frugally accumulate resources from low-yield contexts. 

noun
  • A collection made by gleaning. 

reap

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

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

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

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

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

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