Weirdness - a lump on my son's back has just yielded what looks like a small mollusc shell.  We are assuming that this entered his body through a cut or a graze years ago, but no-one remembers an injury at the beach that could have permitted this.

Question:  I am planning to post a 12,400 story in easily digestable segments of 1,500 to 2,000 words.  How often should I put these up?
All at once?
One a day?
Other?
Advice please!