My parents bought a huge jar of green olives a couple months ago. They are yet to open it because they probably wouldn’t go through it fast enough. The jar said to use up within 3-4 days after opening. How true is this? Do they actually spoil or are they just not as nice anymore?

I want to split the jar between their household and mine but that’s still a significant amount of olives. I’m currently on a cut so I can’t really stuff my face with them unfortunately lol. I’m not sure how well they hold up in the freezer. I assume the texture changes but if the flavor remains I could just use them in cooking.

My question: can I freeze olives or will they last long enough in the original jar as-is?