Is jokingly saying to one's wife, "Someone will come to take [you]," considered an allusion to divorce, and does it resemble saying, "Marry [someone else]?"

Figurative divorce does not take effect unless the husband intends it. So, if you did not intend divorce with your words and you were joking, then no divorce takes place. As for writing "divorce" in a search engine, divorce does not take effect by it even if it is an explicit term, due to the absence of intention, because writing about divorce has the ruling of a figurative expression. We should note that excessive joking is blameworthy, and that divorce with explicit wording takes effect even if the husband was joking.