Definition- A groups $G$ is called Frobenius if it has a proper nontrivial subgroup $H$ such that $H \cap H^g=1\ \forall\ g\in G-H$.
Do we have a structure or classification theorem for (finite) Frobenius groups that classify all the groups which are Frobenius. I dont think so.
Then how can I get a lot of examples of Frobenius groups?
What commonly seen groups are Frobenius? Like, I know that $D_{2n}$ with $n$ odd is frobenius.