earthquake vs trembler

earthquake

noun
  • A shaking of the ground, caused by volcanic activity or movement around geologic faults. 

  • Such a quake specifically occurring on the planet Earth, as opposed to other celestial bodies. 

verb
  • To undergo an earthquake. 

trembler

noun
  • The vibrating hammer, or spring contact piece of a hammer break, as of the electric ignition apparatus for an internal combustion engine. 

  • One who, or that which, trembles. 

  • Any of various New World passerine birds of the family Mimidae. 

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