discover vs slap together

discover

verb
  • To create by moving a piece out of another piece's line of attack. 

  • To find or learn something for the first time. 

  • To question (a person) as part of discovery in a lawsuit. 

slap together

verb
  • To put together hastily; to assemble carelessly and improvisationally. 

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