employ vs pass up

employ

verb
  • To use (somebody for a job, or something for a task). 

  • To hire (somebody for work or a job). 

  • To make busy. 

noun
  • The state of being an employee; employment. 

pass up

verb
  • To submit (hand in) items to a person, usually one's teacher. 

  • Used other than figuratively or idiomatically: see pass, up. 

  • To refuse (not accept); forgo. 

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