Hdhhd.........................m......?cool
Hamlet wants to kill Claudius as he is having a discussion with his mother, Gertrude, however he accidentally kills Polonius instead. It is important that he finds him praying, because he holds back killing him because he does not want him to be killed while he is praying for his sins, because that would mean he is going to heaven. Hamlet wants him to go to hell. He decides to wait until Claudius commits another crime such as incest or heavy drinking.
The Ghost of the Christmas present is referring to the approximately 1800 Christmases that have come and gone since the birth of Christ, culminating up to the point where the story is told.