harness vs self-control

harness

verb
  • To capture, control or put to use. 

  • To equip with armour. 

  • To place a harness on something; to tie up or restrain. 

noun
  • A restraint or support, especially one consisting of a loop or network of rope or straps. 

  • The part of a loom comprising the heddles, with their means of support and motion, by which the threads of the warp are alternately raised and depressed for the passage of the shuttle. 

  • A collection of wires or cables bundled and routed according to their function. 

  • Equipment for any kind of labour. 

self-control

verb
  • To control oneself or itself. 

noun
  • The ability to control one's desires and impulses; willpower. 

How often have the words harness and self-control occurred in a corpus of books? (source: Google Ngram Viewer )