How Long Does an Adult Coffretchi with full Hearts Last Without Care?

[dailyturnip]

I have/had a Tamagothi friends. I lost it this Monday at school at 3:45. She was at full hearts and was a Coffretchi, 4 years old. It's now Friday. I know she's probably dead by now, but anyone know the exact time it takes?

 

[Joc]

Aww. That gives me flashbacks of my own Coffretchi, but you're even less to blame since it was due to the chaos of a place where you're forced to be. She either died or fled away the next afternoon, I estimate. Hope she managed to save herself.