Types of stuttering -- is there a word for this?

Types of stuttering -- is there a word for this? I am thinking about getting my 3 year old evaluated. I am not sure if this is normal or not. I am not asking for advice per say on what to do, but I am curious if stuttering is something that is sub-divided into different types, and if so, what this one is called. ​ He never has trouble at the beginning of or middle of words the way I see "classical" stuttering portrayed on TV, but in the middle of a sentence he will often repeat a word: \-- "Dadda, I want to go to the store because, because, because, because, because, because I want a cookie." The 'because' in a sentence like this could be repeated more than 2-3 times, sometimes around 10 times. ​ Another example: \-- "He did not put the toy in the in the in the in the in the in the play area." Again, 'in the' could be repeated around 10 times sometimes. ​ Is this type of stuttering called something in particular? ​ Thanks!