pro tem vs working

pro tem

adj
  • acting (of a job or role), serving temporarily 

  • temporary 

adv
  • temporarily; for the time being 

working

adj
  • In paid employment. 

  • Enough to allow one to use something. 

  • Used in real life; practical. 

  • Of or relating to employment. 

  • That suffices but requires additional work. 

  • That is or are functioning. 

noun
  • Method of operation. 

  • Becoming full of a vegetable substance. 

  • Operation; action. 

  • The incidental or subsidiary calculations performed in solving an overall problem. 

  • A train movement. 

  • Fermentation. 

  • A place where work is carried on. 

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