404. Now I would like to ask you some questions about the length of time that you have been using your (CURRENT METHOD) without interruption.
In what month and year did you begin the most recent period of continuous use of (CURRENT METHOD)?

315F. For how long have you been using (CURRENT METHOD) continuously?

337. For how long had you been using (LAST METHOD) before you stopped using it (last time)?

331) For how long have you been using (CURRENT METHOD) continuously?

429) How long have you used this method without interruption before stopping it?

323. For how long have you been using (CURRENT METHOD) continuously?