conventional vs pro forma

conventional

adj
  • Pertaining to a convention, as in following generally accepted principles, methods and behaviour. 

  • Ordinary, commonplace. 

  • In accordance with a bidding convention, as opposed to a natural bid. 

  • Banal, trite, hackneyed, unoriginal or clichéd. 

  • Pertaining to a weapon which is not a weapon of mass destruction. 

  • Making use of synthetic fertilizers and pesticides. 

noun
  • A conventional gilt-edged security, a kind of bond paying the holder a fixed cash payment (or coupon) every six months until maturity, at which point the holder receives the final payment and the return of the principal. 

pro forma

adj
  • Occurring, undertaken, or performed as a perfunctory matter, in the interest of form, or for the sake of formality. 

  • Of or relating to a document of form, especially an invoice sent in advance. 

  • Showing projected costs, liabilities, etc., especially as a result of an expected action or situation. 

noun
  • A document that shows the standard entries of a form or similar document. 

adv
  • Undertaken or performed as a perfunctory matter, in the interest of form, or for the sake of politeness. 

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