1"Every time," "always," or "often" — used when something happens repeatedly or on each occasion.
彼女は毎度違う服装で現れる。
She shows up in different clothes every time.
すみません、毎度お手数をおかけします。
Sorry, I keep troubling you every time.
毎度のことで恐縮ですが、また確認をお願いします。
I'm sorry to ask again as always, but could you please confirm once more?
2A shortened greeting used by shopkeepers, from 「毎度有り難うございます」 ("thank you for your continued patronage"), mainly heard in business settings.
魚屋のおやじが「毎度！」と威勢よく声をかけてきた。
The fishmonger greeted me cheerfully with "Maido!"
レジの店員が「毎度ありがとうございます」と会釈した。
The cashier bowed and said "thank you for your continued patronage."