apace vs helter-skelter

apace

adv

  • Quickly, rapidly, with speed. 

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 apace and helter-skelter occurred in a corpus of books? (source: Google Ngram Viewer )