stifle vs trigger

stifle

noun
  • An act or state of being stifled. 

  • A bone disease of this region. 

  • The joint between the femur and tibia in the hind leg of various four-legged mammals, especially horses, corresponding to the knee in humans. 

verb
  • To prevent (a breath, cough, or cry, or the voice, etc.) from being released from the throat. 

  • To make (something) unable to be heard by blocking it with some medium. 

  • To prevent (something) from being revealed; to conceal, to hide, to suppress. 

  • To cause (someone) difficulty in breathing, or a choking or gagging feeling. 

  • To feel smothered; to find it difficult to breathe. 

  • To cause (a dog, horse, or other four-legged mammal) to dislocate or sprain its stifle joint. 

  • To die of suffocation. 

  • To keep in, hold back, or repress (something). 

  • To make (an animal or person) unconscious or cause (an animal or person) death by preventing breathing; to smother, to suffocate. 

  • To treat (a silkworm cocoon) with steam as part of the process of silk production. 

trigger

noun
  • An event that initiates others, or incites a response. 

  • An electronic transducer allowing a drum, cymbal, etc. to control an electronic drum unit or similar device. 

  • An event, experience or other stimulus that initiates a traumatic memory or a strong reaction in a person. 

  • An SQL procedure that may be initiated when a record is inserted, updated or deleted; typically used to maintain referential integrity. 

  • A concept or image that upsets somebody by sparking a negative emotional response. 

  • A similar device used to activate any mechanism. 

  • A pulse in an electronic circuit that initiates some component. 

  • A text string that, when received by a player, will cause the player to execute a certain command. 

  • A device that manually lengthens (or sometimes shortens) the slide or tubing of a brass instrument, allowing the pitch range to be altered while playing. 

  • A finger-operated lever used to fire a gun. 

verb
  • To fire a weapon. 

  • To initiate something. 

  • To spark a response, especially a negative emotional response, in (someone). 

  • To activate; to become active. 

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