lead off vs usher

lead off

verb
  • To be the first of any set, especially the first person in a group to speak; to launch or begin something by speaking. 

  • To be the first batter of an inning. 

  • Used other than figuratively or idiomatically: see lead, off. 

noun
  • The first batter in the batting order. 

  • The first batter of an inning. 

  • The short distance that a player stands away from their current base. 

usher

verb
  • To precede; to act as a forerunner or herald. 

  • To lead or guide somewhere. 

  • To accompany or escort (someone). 

  • To guide people to their seats. 

noun
  • A male escort at a wedding. 

  • A doorkeeper in a courtroom. 

  • A person, in a church, cinema etc., who escorts people to their seats. 

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