marking vs trigger finger

marking

noun
  • A mark. 

  • The action of marking. 

  • The characteristic colouration and patterning of an animal. 

  • Any configuration of a Petri net with a number of marks or tokens distributed across it. 

trigger finger

noun
  • the forefinger 

  • a finger used in pulling the trigger of a firearm 

  • difficulty encountered in finger flexion or extension caused by the narrowing of the sheath that surrounds that finger's tendon 

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