nounal vs titular

nounal

adj
  • Of, relating to, or acting as a noun. 

titular

adj
  • Of, relating to, being, derived from, or having a title. 

  • Existing in name only; nominal. 

  • Named or referred to in the title. 

noun
  • One who holds a title. 

  • The person from whom a church takes its special name; distinguished from a patron, who must be canonized or an angel. 

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