sometime vs up-to-date

sometime

adj
  • Former, erstwhile; at some previous time. 

  • Occasional. 

adv
  • At an indefinite but stated time in the past or future. 

up-to-date

adj
  • Current; recent; the latest. 

  • Informed about the latest news or developments; abreast. 

How often have the words sometime and up-to-date occurred in a corpus of books? (source: Google Ngram Viewer )