forth vs sometime

forth

adv
  • Forward in time, place or degree. 

  • Out into view; from a particular place or position. 

sometime

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

adj
  • Occasional. 

  • Former, erstwhile; at some previous time. 

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