belabour vs thunk

belabour

verb
  • To beat soundly; thump; beat someone. 

  • To labour about; labour over; work hard upon; ply diligently. 

  • To attack someone verbally. 

  • To discuss something unduly or repeatedly; to harp on. 

  • To explain or elaborate at length or in excessive detail; overelaborate. 

thunk

verb
  • To strike against something, without breakage, making a "thunk" sound. 

  • To delay (a computation). 

  • To execute (code) by means of a thunk. 

intj
  • Representing the dull sound of the impact of a heavy object striking another and coming to an immediate standstill, with neither object being broken by the impact. 

noun
  • A specialized subroutine that one software module uses to execute code in another module. 

  • In the Scheme programming language, a function or procedure taking no arguments. 

  • A delayed computation. 

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