peak vs plunge

peak

noun
  • The extremity of an anchor fluke; the bill. 

  • The highest value reached by some quantity in a time period. 

  • The upper aftermost corner of a fore-and-aft sail. 

  • A point; the sharp end or top of anything that terminates in a point; as, the peak, or front, of a cap. 

  • The top, or one of the tops, of a hill, mountain, or range, ending in a point. 

  • The whole hill or mountain, especially when isolated. 

  • The narrow part of a vessel's bow, or the hold within it. 

  • A local maximum of a function, e.g. for sine waves, each point at which the value of y is at its maximum. 

adj
  • At the greatest extent; maximum. 

  • bad or unfortunate. 

  • Unlucky; unfortunate 

  • Maximal, quintessential, archetypical; representing the culmination of its type. 

  • Bad 

verb
  • To reach a highest degree or maximum. 

  • To pry; to peep slyly. 

  • To rise or extend into a peak or point; to form, or appear as, a peak. 

  • To raise the point of (a gaff) closer to perpendicular. 

  • To cause to adopt gender-critical or trans-exclusionary views (ellipsis of peak trans). 

  • To acquire sharpness of figure or features; hence, to look thin or sickly. 

  • To become sick or wan. 

plunge

noun
  • The act of plunging or submerging. 

  • Heavy and reckless betting in horse racing; hazardous speculation. 

  • A dive, leap, rush, or pitch into (into water). 

  • The act of pitching or throwing oneself headlong or violently forward, like an unruly horse. 

verb
  • To pitch or throw oneself headlong or violently forward, as a horse does. 

  • To bet heavily and recklessly; to risk large sums in gambling. 

  • To thrust into liquid, or into any penetrable substance; to immerse. 

  • To cast, stab or throw into some thing, state, condition or action. 

  • To fall or rush headlong into some thing, action, state or condition. 

  • To remove a blockage by suction. 

  • To dive, leap or rush (into water or some liquid); to submerge oneself. 

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