heightening vs increscent

heightening

noun
  • The act by which something is heightened or increased. 

increscent

noun
  • A crescent oriented with horns turned to dexter (pointing left). 

adj
  • Of the Moon: growing in apparent size; waxing. 

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