sitting vs trimester

sitting

noun
  • The part of the year in which judicial business is transacted. 

  • Uninterrupted application to anything for a time; the period during which one continues at anything. 

  • A legislative session (in the sense of "meeting", not "period"). 

  • The incubation of eggs by a bird. 

  • A seance or other session with a medium or fortuneteller. 

  • A period during which one is seated for a specific purpose. 

  • A special seat allotted to a seat-holder, at church, etc. 

  • A clutch of eggs laid by a brooding bird. 

adj
  • Occupying a specific official or legal position; incumbent. 

  • Executed from a sitting position. 

trimester

noun
  • A period of three months or about three months; (financial): quarter. 

  • One of the terms of an academic year in those learning institutions that divide their teaching in three roughly equal terms, each about three months long. Compare semester. 

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