hotfoot vs pro tem

hotfoot

adv
  • Hastily; without delay. 

verb
  • To run (a distance). 

adj
  • Moving with haste or zeal. 

noun
  • The prank of secretly inserting a match between the sole and upper of a victim's shoe and then lighting it. 

pro tem

adv
  • temporarily; for the time being 

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

  • temporary 

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