I think we can have a friendly discussion. You argue in a friendly way, I have found.
No, I believe "term" refers to the time when the a people's religion has been superseded by the next religion. In the Qur'an it is expressed often that the people the new Messenger comes to is destroyed, but the reason they are destroyed in my view is because they rejected the new Messenger. I don't know if every time when a Messenger comes the people is described as being destroyed. I know I have seen them often as being destroyed in some way. You would know that better than I would. I don't profess to have more knowledge of the Qur'an than you do.
@InvestigateTruth is the Islam expert among Baha'is, and I can't vouch to how deep his knowledge is.
In 13:38 for Yusuf Ali he says:
For each period
Is a Book (revealed).
Muhammad , "The Holy Qur-an", 13.38
According to Momen, the word "period" is a translation of the word "ajal", which is the same word that is translated as "term" in that verse. That's the best I can put forward.