early on vs untimely

early on

adj

  • Early in a process. 

adv

  • At an early stage. 

untimely

adj

  • Early; premature. 

  • At an inopportune time. 

adv

  • Prematurely. 

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