clear one's throat vs hock

clear one's throat

verb
  • Forcibly, sometimes mutedly, expelling air from one's lungs, sometimes to clear mucus, sometimes to attract attention to something; less vigorous than coughing. 

hock

verb
  • To produce mucus from coughing or clearing one's throat. 

  • To disable by cutting the tendons of the hock; to hamstring; to hough. 

  • To leave with a pawnbroker as security for a loan. 

  • To cough while the vomit reflex is triggered; to gag. 

  • To bother; to pester; to annoy incessantly. 

noun
  • Installment purchase. 

  • Debt. 

  • A Rhenish wine, of a light yellow color, either sparkling or still, from the Hochheim region; often applied to all Rhenish wines. 

  • Meat from that part of a food animal. 

  • Prison. 

  • The tarsal joint of a digitigrade quadruped, such as a horse, pig or dog. 

  • The last card turned up in the game of faro. 

  • Pawn, obligation as collateral for a loan. 

How often have the words clear one's throat and hock occurred in a corpus of books? (source: Google Ngram Viewer )