thrash about vs wallow

thrash about

verb
  • to move unpredictably and often violently, usually unaware 

wallow

verb
  • To move lazily or heavily in any medium. 

  • To roll oneself about in something dirty, for example in mud. 

  • To live or exist in filth or in a sickening manner. 

  • To fade, fade away, wither, droop; fail to flourish. 

  • To immerse oneself in, to occupy oneself with, metaphorically. 

adj
  • Tasteless, flat. 

noun
  • A pool of water or mud in which animals wallow, or the depression left by them in the ground. 

  • An instance of wallowing. 

  • A kind of rolling walk. 

How often have the words thrash about and wallow occurred in a corpus of books? (source: Google Ngram Viewer )