promising vs self-confident

promising

adj

  • Encouraging and inspiring confidence. 

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

  • a promising young apprentice 

noun

  • The act of making a promise. 

self-confident

adj

  • Confident in one's own abilities. 

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