field work vs outwork

field work

noun
  • A temporary fortification in the field 

  • The collection of raw data, in the field 

outwork

noun
  • A minor, subsidiary fortification built beyond the main limits of fortification. 

  • Agricultural work done outdoors in the fields. 

verb
  • To work out to a finish; to complete. 

  • To work faster or harder than. 

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