slapdash vs tip of the iceberg

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. 

tip of the iceberg

noun
  • A small indication of a larger possibility; the first part encountered of a problem that is much bigger than it seems. 

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