What is adverb for period?

There isn't a single perfect adverb for "period" because the meaning of "period" can vary depending on the context.

Here are some options and their usage:

For time:

* Periodically: This means "at regular intervals" or "from time to time." Example: "The machine needs to be serviced periodically."

* Occasionally: This means "sometimes" or "now and then." Example: "We occasionally go out for dinner."

* Temporarily: This means "for a limited time." Example: "The road is temporarily closed for repairs."

For duration:

* Briefly: This means "for a short time." Example: "The meeting was briefly interrupted."

* Prolongedly: This means "for a long time." Example: "The negotiations were prolongedly difficult."

For punctuation:

* You wouldn't use an adverb for the punctuation mark "period." Instead, you might say: "The sentence ends with a period."

For historical periods:

* Historically: This means "in the past." Example: "Historically, this area was known for its agriculture."

Choose the adverb that best fits the specific meaning you want to convey.