Wi-fi crashing / Going offline receptively

Everyday without fail, my wi-fi goes out at minimal 6 times a day and it repeats the same cycle every time shutdown or crashes reboots for 5 minutes, goes online for 3 minutes then repeats this 3 or 4 times , until it goes back to normal for an hour maybe and hour and a half, I've replaced the coax cable and went under the house 4 times while replacing said cable.