@LUCY_BC
The most common is epithelial ovarian cancer (about 90% of cases) of which the sub-group High-Grade Serous is the most common (accounts for about 70% of all OVC).
If you don't have the booklet By Your Side, you might want to order it. Along with lots of information on our disease and it's treatment you will find a good break down of the various types of OVC on page 25. You can order the booklet in hard or soft copy from Ovarian Cancer Canada
https://ovariancanada.org/Living-with-Ovarian-Cancer/Support-resources It's free and the soft copy comes very quickly to your email for download. I also have the hard copy, which I keep on my desk for easy reference.