Just like you do year round, once a week.
First it has only been 9 days so there is nothing to be concerned about however you need to make sure that your husbandry is OPTIMAL so this behavior does not persist.
How long have you had your snake for?
How old is your BP?
How big is your snake (length, weight)?
What type of enclosure do you use?
How big is your enclosure?
Is your enclosure in a low traffic area?
What are your temps (cool & warm side)?
What is your humidity?
What type of thermometer/hygrometer do you use (dial,stick,or digital)?
What kind of hides do you provide (log, homemade, cubbyholes etc) and how many do you have?
Are your hides tight (all side touching your BP's body) and identical?
What do you usually feed to your BP (Rat, Mice and size)?
How often do you handle your BP
Is your BP in shed?
Is your BP healthy?