partnerless vs single-handed

partnerless

adj

  • Without a partner. 

single-handed

adj

  • Without help from others; unassisted. 

  • Using only one hand. 

  • Designed for only one hand. 

adv

  • In a single-handed manner. 

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