day off: a day when you do not work
I understand the meaning of it. This post is focused on the opposite of it. Consider the following conversation.
Anthony: "Where were you last night? I was trying to drop by you."
Kevin: "I worked late. I didn't get off work until midnight."
Even though I didn't find the definition on the Merriam-Webster dictionary or the Cambridge Dictionary, I’m pretty sure "someone gets off work" means the employee gets the permission to stop working and go home.
The question is whether "off from work" means the same thing.
Ngram Viewer shows that both are in use, though the latter seems to have a different meaning.
Do they mean the same thing? If not, what does "off from work" mean? Does "off from work" go with the meaning at the beginning of the post?