irresponsibly vs slapdash

irresponsibly

adv
  • In an irresponsible manner; so as to be irresponsible. 

slapdash

adv
  • In a hasty or careless manner. 

  • With a slap; all at once; slap. 

  • Directly, right there; slap-bang. 

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

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

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