helter-skelter vs tremulous

helter-skelter

adj

  • Carelessly hurried and confused. 

noun

  • A helical fairground slide. 

  • Confusion or turmoil. 

adv

  • In confused, disorderly haste. 

tremulous

adj

  • Timid, hesitant; lacking confidence. 

  • Trembling, quivering, or shaking. 

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