Day in Day Out
WordNet

adverb


(1)   For an indefinite number of successive days
WiktionaryText

Adverb


day in, day out
  1. Every day; daily; constantly or continuously; especially, of something that has become routine or monotonous.
    Even if you like peanut butter sandwiches, eating the same sandwiches day in, day out will get old.
 
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