How many times did Achilles sleep with Patroclus' dead body?

I'm curious, in the context of the story of Achilles and Patroclus, how many times is it recorded or speculated that Achilles actually slept with the body of his fallen comrade Patroclus after his death? This question stems from the deep emotional bond and the tragic loss depicted in the tale, and I'm interested in understanding the extent of Achilles' grief-stricken reaction. Was this an isolated incident, or was it something that occurred multiple times as a means of coping with the unimaginable loss?