in contention vs questionable

in contention

prep
  • Used other than figuratively or idiomatically: see in, contention. 

  • Contending for a title or championship. 

questionable

adj
  • Of dubious respectability or morality. 

  • Problematic; open to doubt or challenge. 

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