ass over teakettle vs relentlessly

ass over teakettle

adv

  • Frantically. 

  • Tumbling upside down. 

adj

  • In complete disarray. 

relentlessly

adv

  • In a relentless manner. 

How often have the words ass over teakettle and relentlessly occurred in a corpus of books? (source: Google Ngram Viewer )