Is it permissible to fast the days of a vow intermittently, after vowing to fast them consecutively, and what should one do if one is unable to fast them consecutively?

Whoever vows to fast consecutive days must fulfill their vow consecutively, and it is not permissible for them to separate them. If she breaks the fast due to an excuse, she has a choice between two options: resuming the fast anew consecutively, or completing what remains and offering an expiation for breaking an oath (emancipating a slave, or feeding ten needy persons, or clothing ten needy persons). If she is unable to do any of these, then fasting three days.