hands down vs one-handed

hands down

adv
  • without much effort; easily 

  • without question; undoubtedly 

  • by a large margin (in a game or contest) 

  • Used other than figuratively or idiomatically: see hands, down. 

one-handed

adv
  • Very easily, without effort. 

  • Using only one hand; one-handedly. 

adj
  • Designed for use with one hand 

  • That uses one hand. 

  • Involving the actions of only one person. 

  • Chiral, having an asymmetric structural orientation. 

  • Having only one hand. 

  • Performed using only one hand. 

  • Pornographic in nature. 

How often have the words hands down and one-handed occurred in a corpus of books? (source: Google Ngram Viewer )