on the button vs on time

on the button

prep

  • Exactly, precisely. 

on time

prep

  • By installments, payments over a period of time. 

  • By a player's running out of time. 

  • Punctually or according to the schedule. 

adj

  • Punctual or according to schedule. 

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