The word "commiteth" ( or more accurately "practices" ) in the Greek is...
διά
dia
dee-ah'
A primary preposition denoting the channel of an act; through (in very wide applications, local, causal or occasional). In composition it retains the same general import: - after, always, among, at, to avoid, because of (that), briefly, by, for (cause) . . . fore, from, in, by occasion of, of, by reason of, for sake, that, thereby, therefore, X though, through (-out), to, wherefore, with (-in). In composition it retains the same general import.
Total KJV occurrences: 610
The one who commits sin "occasionally" or "casually". Is different from the one who commits sin once or twice.