undecided vs unfaltering

undecided

noun
  • A voter etc. who has not yet come to a decision. 

adj
  • Uncommitted, not having reached a decision. 

  • Open and not yet settled or determined. 

unfaltering

adj
  • Without faltering, continuous, steadfast. 

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