A couple basic searches on the internet will tell you more than we can elobarate on here. Basically though - White clovers will generally last 3-5 years with proper care.(mowing, Lime, and/or Potassium)

Red clover & Alsike clovers will last 2 years, though many people consider them like annuals and re-plant every year.

Crimson clover, Burseem Clover, Arrowleaf clover and others are annual clovers - that only come back the next year by re-seeding themselves.

FH