Seeking Babysitter For Occasional Weekday/ Weekend Half-days

We have an exuberant 3. 5-year-old and a very sweet 7-month-old. My partner and I both work in jobs with variable schedules and are looking to find a responsible childcare provider we can call for occasional week day or weekend half days, as well as the occasional date night. Our toddler is in preschool, so weekdays it will typically just be our baby. We can offer consistent recurring hours if desired (ex. Tuesday or Friday 12-4pm, or Thursday 8am-2pm, or Saturday 2-5pm) but are also happy to work with someone who is available only a few times per month. Lots of flexibility with hours as our schedule changes every week! Seeking someone with experience with infants, as our youngest is only 7 months. We would love to someone who could be in our contact list for years to come and a recurring presence as the kids age.