feverishly vs helter-skelter

feverishly

adv
  • With speed; rapidly. 

  • With excitement and determination. 

helter-skelter

adv
  • In confused, disorderly haste. 

noun
  • A helical fairground slide. 

  • Confusion or turmoil. 

adj
  • Carelessly hurried and confused. 

How often have the words feverishly and helter-skelter occurred in a corpus of books? (source: Google Ngram Viewer )