periodically
adv 2
Definitions
adv
1
In a manner that is regular or periodic.
Put two encasings on a mattress if one must be removed periodically for cleaning.
2
intermittently or recurrently.
The announcement comes amid mounting pressure on university administrators to rein in pro-Palestinian demonstrations, which have erupted periodically on college campuses across the country over the past year and led to the arrest of hundreds of demonstrators.
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