bedlam vs helter-skelter

bedlam

noun
  • A place or situation of chaotic uproar, and where confusion prevails. 

helter-skelter

noun
  • Confusion or turmoil. 

  • A helical fairground slide. 

adj
  • Carelessly hurried and confused. 

adv
  • In confused, disorderly haste. 

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