You would almost never hear it in spoken English unless you were buying furniture. Women would use it more than men, the same way as they can tell the color burgundy from dark red. You might see it a little more in written English.

It is rarely used nowadays.

Although some people use the word 'divan' to mean 'sofa' it is actually a bit different to a sofa as it is 'a long, low seat that has no back or arms or only part of a back and one arm'. In British English 'Divan' is also used to mean a bed that has a thick base and usually no footboard. Another word which is also used to mean 'sofa' is 'settee'.

I've heard the word divan before, but I believe sofa or couch is used more in common conversation. When I hear divan, I think of a specialty boutique or fancy inn.