Why isn't there a "most recent" option when searching for keywords

You can use "1 hour" and "24 hour" options

1 hour obviously yields very little if you are searching for something specific, while 24 hour proceeds to use the exact same threads for the whole 24 hours ( and if you look on the next page, you will proceed to be searching for stuff that was months ago)

I can't see any new threads/discussions about the keyword after the first 24 hour page has been filled your old forum had a most recent option, why the hell doesn't this one?