on an irregular basis

Not very often and/or in an inconsistent, irregular manner. The general manager drops into the restaurant on a pretty irregular basis, so the members of staff tend to be pretty laid back here.

See also: an, basis, irregular, on

See also:

on a regular basis
in fits and starts
by fits and starts
fits and starts
fits and starts, by
have fits and starts
find (someone or something) a little off
find (someone or something) a bit off
sputter out
swigged

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