appraise vs calibrate

appraise

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

  • To consider comprehensively. 

  • To apprise, inform. 

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

  • To estimate; to conjecture. 

  • To praise; to commend. 

calibrate

verb
  • To mark the scale of a measuring instrument. 

  • To measure the caliber of a tube or gun. 

  • To check or adjust by comparison with a standard. 

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