all over the map vs helter-skelter

all over the map

prep
  • Widely scattered or distributed; numerous and differing greatly. 

  • In widely scattered directions; in a widely varying manner. 

helter-skelter

noun
  • A helical fairground slide. 

  • Confusion or turmoil. 

adj
  • Carelessly hurried and confused. 

adv
  • In confused, disorderly haste. 

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