lurch vs unhorse

lurch

verb
  • To make such a sudden, unsteady movement. 

  • To defeat in the game of cribbage with a lurch (double score as explained under noun entry). 

noun
  • A sudden or unsteady movement. 

  • A double score in cribbage for the winner when his/her adversary has not yet pegged his/her 31st hole. 

  • An old game played with dice and counters; a variety of the game of tables. 

unhorse

verb
  • To disrupt or unseat; to remove from a position. 

  • To forcibly remove from a horse. 

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