Question: In the credits a character is shown as "2 to 5 / 7 to 9". Who is this character and what is the significance of her name?
Answer: In "Proshai, Livushka", she's the person talking to Meadow in the hall, while Tony watches, and says to Meadow, "I'm so sorry about your grandmother." She also appears and is credited in s03e05, "Another Toothpick" and s03e13, "Army of One." In s06e18 "Kennedy and Heidi", one of Tony's men points her out (although refers to her as 3 to 5, 7 to 9) and when someone asks why they call her that, he says "she never misses a wake." Although in this episode, Marie Donato is not credited.
Answer: I'm not sure which person you're referring to here specifically, but the meaning is someone who makes a habit of constantly going to funeral calling hours (normally 2pm-5pm and 7pm to 9pm) for morbid entertainment or gossip purposes (elderly ladies, for example).
Ryan Grubb