helter-skelter vs unsettlement

helter-skelter

noun
  • Confusion or turmoil. 

  • A helical fairground slide. 

adj
  • Carelessly hurried and confused. 

adv
  • In confused, disorderly haste. 

unsettlement

noun
  • The quality of being unsettled; upset or unrest. 

  • A illegal or unofficial settlement, or community of people living together. 

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