past master vs whiz

past master

noun
  • One who has an extremely high level of ability or knowledge within an area of achievement or expertise. 

  • Someone who has previously been a master at a given lodge. 

whiz

noun
  • Someone who is remarkably skilled at something. 

  • Pickpocketing. 

  • An act of urination. 

  • Amphetamine. 

  • A whirring or hissing sound (as above). 

verb
  • To urinate. 

  • To make a whirring or hissing sound, similar to that of an object speeding through the air. 

  • To rush or move swiftly with such a sound. 

  • To throw or spin rapidly. 

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