milk-and-water vs zestless

milk-and-water

adj

  • Insipid, wishy-washy, weak. 

noun

  • Something insipid or mawkish. 

zestless

adj

  • Lacking zest; passionless, unenthusiastic. 

How often have the words milk-and-water and zestless occurred in a corpus of books? (source: Google Ngram Viewer )