How often is bootcamp held in a month - (july)- in camp pendelton base?

i was wondering how often is marine corp bootcamp held in the month of july or is it scheduled only once every month?? Does is differ from base to base?? also is there a website that tells what to take and not to take for bootcamp?? is it different from other branches of millitary coz i found a website that tells what to and not to bring for bootcamp but thats for the navy... thanks for helping!!