Many times decimal (5)

I believe the answer is:

often

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'many times' is the definition.
(synonyms)

I can't explain the rest of the clue.

(Other definitions for often that I've seen before include "Frequent" , "Regularly" , "Quite frequently" , "Much of the time" , "Multiply" .)

I've seen this clue in The Globe and Mail, The Telegraph, The Times, The Sunday Times and The Guardian.

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