In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[EX Q]: Pharmacists dispense nearly _ billion prescriptions a year.
[EX A]: three

[EX Q]: Psychoanalysis is an intensive form of psychotherapy that meets _ to five times a week.
[EX A]: four

[EX Q]: Volcanoes form in _ different stages.
[EX A]:
nine