What is the frequence for 2CH?

The frequency for 2CH (or 2-chlorohexane) is not a standard term, as "2CH" could refer to various contexts. If you are asking about the frequency of a specific vibrational mode in molecular spectroscopy, that would depend on the molecular structure and the type of spectroscopy being used (e.g., infrared or NMR). Please provide additional context for a more precise answer.