no strings attached vs unequivocal

no strings attached

adj

  • Characterized by an absence of conditions or obligations. 

adv

  • Without conditions or obligations; without a catch. 

unequivocal

adj

  • Unambiguous; without equivocation or ambiguity; singularly clear, unmistakable, or unquestionable 

How often have the words no strings attached and unequivocal occurred in a corpus of books? (source: Google Ngram Viewer )