appraise vs gen up

appraise

verb
  • To apprise, inform. 

  • To consider comprehensively. 

  • To determine the value or worth of (something), particularly as a person appointed for this purpose. 

  • To estimate; to conjecture. 

  • To judge the performance of someone, especially a worker. 

  • To praise; to commend. 

gen up

verb
  • To inform or teach with all relevant details; to brief. 

  • To study in detail; to familiarize oneself with all available information. 

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