@Phoenix32890,
Hi Mame,
I'm not sure if I'm understanding you right... but I think don't think what you have in mind is a profile option.
First click "able2know." There is a light blue bar in about the middle of the page, towards the top. In that light blue bar it says "Topic age" and then options for "day," "week," "month," "year," and finally "all time." I think you might want "all time." (Though again I'm not certain I understood your question.)