Furthermore vs. Moreover

[mikko4]

Hi,
I have just a simple two question.
Is there any difference between the words ?
and
Which of them is used more frequently ?

Thanks in advance

[David L.]

'furthermore' has a more serious, formal sense.
So:
A wood burning fire gives just as much warmth as gas, and moreover, it's cheaper.

A soldier is being reprimanded:
"As your commanding officer, I am ordering that, as punishment, you will peel potatoes in the kitchens, and furthermore, that you be confined to barracks for a period of one month."

[mikko4]

Thak you once again. It was helpful