everduring vs everlasting

everduring

everlasting

noun
  • A durable cloth fabric for shoes, etc. 

  • An everlasting flower. 

adv
  • Extremely. 

adj
  • Existing with infinite temporal duration (as opposed to existence outside of time). 

  • Lasting or enduring forever; existing or continuing without end 

  • Continuing indefinitely, or during a long period; perpetual; sometimes used, colloquially, as a strong intensive. 

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