There are many keyword research tools, here is just one of them. 1. Go to: https://adwords.google.com.au/select/KeywordToolExternal 2. Type in Insurance 3. Scroll down and have a look You will notice quite a lot of keywords with high volumes of searches (100,000s/month!)
In my early days of SEO i have a project related Insurance Company and from that i experience some thing. If your Insurance company is region related then its not very hard to get your keyword on the top of SE, normally about 100000 searches are done on Insurance Company or Companies hard to get at once. Try synonyms with less competition keywords.