How to correctly use 恐怕 According to Pleco, 恐怕 has 2 definitions


  
  fear; dread; be afraid of
  perhaps; probably; maybe
  


The second definition is what I am struggling with. I was taught that it is similar to 也许, but in using 恐怕 other reasons must first be stated. For example, in a conversation between two people, person A states some causes for a certain event, then person B may say 恐怕，［another reason]. Is this accurate? 

Even if not, I'm not too confident in my understanding of it. Could someone please give a comprehensive explanation? Also is 恐怕 used more in certain parts of China?
As a native Chinese speaker, I would say "恐怕" is used most frequently in the context where the speaker expresses his belief that something he does not wish to happen might happen. For example, the coach of L.A. Lakers may say "恐怕 Kobe 不能再打籃球了", i.e. "I am afraid Kobe will not be able to play basketball anymore". 

Nevertheless, like in English, "恐怕" sometimes can be used to express conceding attitude. For instance, we may say "恐怕你在這點上是錯的", i.e. "I am afraid you are wrong in this point".