How do I use Regex?

[JBrickelt963]

Hello, I'm encountering a small obstacle in my use of Undiscord.
I don't know if it is still actively maintained, but I hope to find an answer here anyway.

I can use the simple “Containing text” search, but when I want to use the “regex” function, my query keeps spinning and searching indefinitely. However, I was able to verify the accuracy of the regular expression (regex) via regex101.

I am trying to delete the commands used to call a bot on one of my servers. For example, $us while avoiding messages that simply contain the word “us” in the sentence. My tests were done on several volumes of messages (various commands), the smallest of which (46) gave the same results as the others.

Could this be a problem with the wording, or is it because the regex option requires messages to be searched differently, which takes longer? For the 46 messages, the estimated time is 170 hours... not really a time saver for me.

Thank you in advance for any responses.