droop vs elevation

droop

noun
  • A condition or posture of drooping. 

  • A hinged portion of the leading edge of an aeroplane's wing, which swivels downward to increase lift during takeoff and landing. 

  • Something which is limp or sagging. 

verb
  • To lose all energy, enthusiasm or happiness; to flag. 

  • To slowly become limp; to bend gradually. 

  • To proceed downward, or toward a close; to decline. 

  • To allow to droop or sink. 

  • To hang downward; to sag. 

elevation

noun
  • The condition of being or feeling elevated; heightened; exaltation. 

  • That which is raised up or elevated; an elevated place or station. 

  • The raising of the host—representing Christ’s body—in a mass or Holy Communion service. 

  • The angle which the gnomon makes with the substylar line. 

  • The movement of the axis of a piece in a vertical plane; also, the angle of elevation, that is, the angle between the axis of the piece and the line of sight; distinguished from direction. 

  • The act of raising from a lower place, condition, or quality to a higher; said of material things, persons, the mind, the voice, etc. 

  • A geometrical projection of a building, or other object, on a plane perpendicular to the horizon; orthographic projection on a vertical plane; called by the ancients the orthography. 

  • A hill is an elevation of the ground. 

  • The distance of a celestial object above the horizon, or the arc of a vertical circle intercepted between it and the horizon; altitude. 

  • The measured vertical distance from the peak of a mountain or hill to its bordering lowlands. 

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