度々

たびたび

Adverb (fukushi), word usually written using kana alone

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度々すみませんたびたびすみません

sorry to bother you again

誰人たれびと

whichever person (indefinite pronoun); everyone; every person; all

度にたびに

each time; every time; whenever (something happens); on the occasion of

の度に「のたびに」「のたんびに」

on the occasion of

この度このたび

this occasion; at this time; now