asleep at the wheel vs slapdash

asleep at the wheel

adj
  • Synonym of asleep at the switch 

slapdash

adv
  • With a slap; all at once; slap. 

  • In a hasty or careless manner. 

  • Directly, right there; slap-bang. 

verb
  • To apply, or apply something to, in a hasty, careless, or rough manner; to roughcast. 

adj
  • Produced or carried out hastily; haphazard; careless. 

How often have the words asleep at the wheel and slapdash occurred in a corpus of books? (source: Google Ngram Viewer )