Answer: periodic

AnswerCrossword Clue
PERIODIC

Regular

PERIODIC

On a regular basis

PERIODIC

Like magazine mailings

PERIODIC
Kind of table in chemistry class
PERIODIC
Intermittent
PERIODIC... table (chemistry class topic)
PERIODICRecurrent.
PERIODICIntermittent.
PERIODICFrom time to time.
PERIODICCyclical
PERIODICKind of table
PERIODICLike a planetary orbit
PERIODICLike Mendeleev's table
PERIODICTable for chemists?
PERIODICTable in chemistry class