explain vs overdraw

explain

verb
  • To make plain, manifest, or intelligible; to clear of obscurity; to illustrate the meaning of. 

  • To give a valid excuse for past behavior. 

  • To make something plain or intelligible. 

overdraw

noun
  • The process by which, during the rendering of a three-dimensional scene, a pixel is replaced by one that is closer to the viewpoint, as determined by their Z coordinates. 

verb
  • To use a device for shooting arrows shorter than the draw of the bow. 

  • To draw over the top of existing content. 

  • To withdraw more money from an account than there is credit; to make an overdraft 

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