gain vs seize upon

gain

verb
  • To draw into any interest or party; to win to one's side; to conciliate. 

  • To increase. 

  • To reach. 

  • To be more likely to catch or overtake an individual. 

  • To put on weight. 

  • To run fast. 

  • To acquire possession of. 

  • To have or receive advantage or profit; to acquire gain; to grow rich; to advance in interest, health, or happiness; to make progress. 

adj
  • Easy; tolerable; handy, dexterous. 

  • Honest; respectable; moderate; cheap. 

adv
  • Tolerably; fairly. 

  • Suitably; conveniently; dexterously; moderately. 

noun
  • The thing or things gained. 

  • The factor by which a signal is multiplied. 

  • The act of gaining; acquisition. 

  • A square or bevelled notch cut out of a girder, binding joist, or other timber which supports a floor beam, so as to receive the end of the floor beam. 

seize upon

verb
  • To take possession of or claim (an idea, person, event, etc.) as one's own; to assimilate, absorb, annex, co-opt. 

  • To take up, embrace, enact, or turn eagerly to (a plan, idea, ideology, cause, practice, method, etc.); to grasp, understand, and accept quickly; to adopt wholeheartedly or vigorously. 

  • To grasp or take hold of (an object) suddenly, forcibly, or tightly. 

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