bend vs straighten up

bend

verb
  • To become curved. 

  • To stoop. 

  • To cause (something) to change its shape into a curve, by physical force, chemical action, or any other means. 

  • To cause to change direction. 

  • To change direction. 

  • To force to submit. 

  • To submit. 

  • To apply oneself to a task or purpose. 

  • To tie, as in securing a line to a cleat; to shackle a chain to an anchor; make fast. 

  • To adapt or interpret to for a purpose or beneficiary. 

  • To apply to a task or purpose. 

  • To smoothly change the pitch of a note. 

  • To be inclined; to direct itself. 

  • To bow in prayer, or in token of submission. 

  • To swing the body when rowing. 

noun
  • The thickest and strongest planks in a ship's sides, more generally called wales, which have the beams, knees, and futtocks bolted to them. 

  • Hard, indurated clay; bind. 

  • In the leather trade, the best quality of sole leather; a butt; sometimes, half a butt cut lengthwise. 

  • A curve. 

  • The frames or ribs that form the ship's body from the keel to the top of the sides. 

  • Any of the various knots which join the ends of two lines. 

  • One of the honourable ordinaries formed by two diagonal lines drawn from the dexter chief to the sinister base; it generally occupies a fifth part of the shield if uncharged, but if charged one third. 

  • A severe condition caused by excessively quick decompression, causing bubbles of nitrogen to form in the blood; decompression sickness. 

  • A glissando, or glide between one pitch and another. 

straighten up

verb
  • to steer straight 

  • to start living a reformed life 

  • to sit up straight, to stop hunching. 

  • to tidy; tidy up 

  • to deal with; put in order 

  • To become straight, or straighter 

  • To clarify 

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