Minecraft: pickaxe with care and repair?

Hi, I've been playing Minecraft for a long time.

How to repair a pickaxe that is charmed with repair and cautiousness. Disassembly of coal or other Exp giving blocks is not possible by the caution. What does it charge then?

You can do it for example Keep in the off-hand while you get XP:-)

Thanks.

That's not possible.

Ah, but the sword must not have repair otherwise it goes into the character