constant vs untrustworthy

constant

noun
  • A quantity that remains at a fixed value throughout a given discussion. 

  • Any property of an experiment, determined numerically, that does not change under given circumstances. 

  • That which is permanent or invariable. 

  • An identifier that is bound to an invariant value; a fixed value given a name to aid in readability of source code. 

adj
  • Firm; solid; not fluid. 

  • Unchanged through time or space; permanent. 

  • Steady in purpose, action, feeling, etc. 

  • Bounded above by a constant. 

  • Consistently recurring over time; persistent. 

untrustworthy

adj
  • Not deserving of trust; unreliable. 

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