Hi speechful11! When I applied last year, I did the following:
In the volunteer experience description, I listed my role & the organization's name. In the duration section, I included how many months as well as how many hours per week or month. If I remember correctly, there was a place to enter "From Date" and "To Date" and that's where I put "present" if it was still ongoing. I'm not sure if they changed the format for this year but I included two examples of what I did last year below so hopefully that'll help!
From Date
2013-02
To Date
Present
Volunteer Experience Description
AQPA-Quebec Association for People with Aphasia
Geographic Location
Montreal, QC
Duration
11 months, 3-6 hours/week
Total Hours
95 hours
Site Population
Francophone, Anglophone, and multilingual adults with aphasia
Activities
Supported Conversation for Adults with Aphasia training. Facilitate a conversation group & computer lessons. Past work in choir & photography groups.
From Date
2013-11
To Date
Present
Volunteer Experience Description
Observation – Private Practice, (SLP's name here)
Geographic Location
Montreal, QC
Duration
7 weeks
Total Hours
14.5 hours (clinical reference) + 7 hours since
Site Population
Children with fluency, articulation & autism spectrum disorders; Parents of children with ASD
Activities
Observed individual therapy sessions. Observed & helped prepare for biweekly More Than Words (The Hanen Group) workshops & a video feedback session.