mañana vs sometime

mañana

adv

  • Some unspecified time in the future. 

  • Tomorrow. 

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 mañana and sometime occurred in a corpus of books? (source: Google Ngram Viewer )