nightly vs pro tem

nightly

adj
  • Performing, occurring, or taking place every night. 

  • Happening or appearing in the night; night-time; nocturnal. 

  • Used in the night. 

adv
  • Every night. 

noun
  • A build of a software program with the latest changes, released every night. 

pro tem

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

  • temporary 

adv
  • temporarily; for the time being 

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