A lot depends on what you mean by "appearing". Most of my hubs "appear" almost immediately at position 127 or whatever. Of course, that really is insignificant. Your goal is to be on page one of Google.
In addition, depending on the keyphrase you are aiming for your Google position will differ. I have an article where I am targetting "Cool Picture Frames". I am at position 10. But for "best picture frames", I am at position 78.
I use several websites and software packages to help me track this.