secret vs utter

secret

verb
  • To make or keep secret. 

  • To hide secretly. 

noun
  • Private seclusion. 

  • A piece of knowledge that is hidden and intended to be kept hidden. 

  • The key or principle by which something is made clear; the knack. 

  • A form of steel skullcap. 

  • Something not understood or known. 

  • Any prayer spoken inaudibly and not aloud; especially, one of the prayers in the Tridentine Mass, immediately following the "orate, fratres", said inaudibly by the celebrant. 

adj
  • Being or kept hidden. 

utter

verb
  • To reveal or express (an idea, thought, desire, etc.) with speech. 

  • To produce (speech or other sounds) with one's voice. 

  • To put (currency) into circulation. 

  • To commit the crime of uttering (knowingly presenting forged documentation). 

  • To produce (a noise) (of an inanimate object). 

adj
  • Absolute, unconditional, total, complete. 

  • Outer; furthest out, most remote. 

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