promising vs timeous

promising

noun

  • The act of making a promise. 

adj

  • Showing promise, and likely to develop in a desirable fashion. 

  • a promising young apprentice 

  • Encouraging and inspiring confidence. 

timeous

adj

  • in sufficient time; timely 

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