The rhyme scheme in the verse is:

You cannot know (A)
And should not bother; (B)
Tide and market come and go (A)
And so shall your mother. (B)

This follows an ABAB pattern, which is known as alternate rhyme.

A monorhyme means all lines end with the same rhyme (AAAA). Couplets consist of rhyming pairs (AABB, etc.). A triplet consists of three lines that rhyme together (AAA, BBB). A blank verse consists of unrhymed lines, usually in iambic pentameter.