ham hock vs hockle

ham hock

noun
  • The cut of meat at the joint between the leg and foot of a hog. 

hockle

noun
  • A knob in cordage caused by twisting against the lay. 

  • spit, spittle 

verb
  • To damage cordage by twisting against the lay. 

  • to disable by cutting the tendons of the ham. 

  • To mow, as stubble. 

  • To spit. 

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