gulf vs separation

gulf

noun
  • A wide interval or gap; a separating space. 

  • 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 difference, especially a large difference, between groups. 

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

separation

noun
  • An interval, gap or space that separates things or people. 

  • Departure from active duty, while not necessarily leaving the service entirely. 

  • An agreement legalizing such an arrangement. 

  • An object that separates two spaces. 

  • The act of disuniting two or more things, or the condition of being separated. 

  • The act or condition of two or more people being separated from one another. 

  • The place at which a division occurs. 

  • The act or condition of a married couple living in separate homes while remaining legally married. 

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