i break it down on a per week or per day basis for people - and if they really struggle, i ask them to grab pen and paper and write it out. it can be frustrating when you're not understanding (or not able to make yourself understood!) so i will dumb it down as much as i can (sorry, i don't mean that to sound offensive!! but it's the only way i can think of to explain it lol)

obviously my understanding is a lot different to a customer and sometimes i have to take it back to basics