increase vs taper

increase

verb
  • To become more nearly full; to show more of the surface; to wax. 

  • To multiply by the production of young; to be fertile, fruitful, or prolific. 

  • To make (a quantity, etc.) larger. 

  • (of a quantity, etc.) To become larger or greater. 

noun
  • The creation of one or more new stitches; see Increase (knitting). 

  • For a quantity, the act or process of becoming larger 

  • Offspring, progeny 

  • An amount by which a quantity is increased. 

taper

verb
  • To make thinner or narrower at one end. 

  • To diminish gradually. 

  • To become thinner or narrower at one end. 

  • (of a central bank) To tighten monetary policy. 

adj
  • Tapered; narrowing to a point. 

noun
  • A small light. 

  • A cone-shaped item for stretching the hole for an ear gauge (piercing). 

  • Someone who works with tape or tapes. 

  • A thin stick used for lighting candles, either a wax-coated wick or a slow-burning wooden rod. 

  • One who operates a tape machine. 

  • A slender wax candle. 

  • A tapering form; gradual diminution of thickness and/or cross section in an elongated object. 

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