gulf vs variation

gulf

noun
  • A difference, especially a large difference, between groups. 

  • A portion of an ocean or sea extending into the land; a partially landlocked sea 

  • The bottom part of a list of those awarded a degree, for those who have only just passed. 

  • That which swallows irretrievably; a whirlpool; a sucking eddy. 

  • A hollow place in the earth; an abyss; a deep chasm or basin. 

  • A large deposit of ore in a lode. 

  • A wide interval or gap; a separating space. 

verb
  • To award a degree to somebody who has only just passed sufficiently. 

variation

noun
  • A related but distinct thing. 

  • Deviation from the mean orbit of a heavenly body. 

  • The act of varying; a partial change in the form, position, state, or qualities of a thing. 

  • The angular difference at the vessel between the direction of true north and magnetic north. 

  • A line of play that differs from the original. 

  • The modification of a hereditary trait. 

  • A technique where material is repeated with alterations to the melody, harmony, rhythm, timbre, texture, counterpoint or orchestration; but with some invariant characteristic, e.g. a ground bass. 

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