What is the accent on second syllable called what?

There's no specific term for an accent on the second syllable. The general term used for an accent is stress.

However, the location of the stress can be described:

* Second-syllable stress: This simply indicates that the second syllable of a word receives the strongest emphasis.

For example:

* a-bove

* believe

* present (as a noun)

Keep in mind that word stress can vary depending on the part of speech or context. For instance, "present" (as a noun) has the stress on the second syllable, but "present" (as a verb) has the stress on the first syllable.