I know the WHO recommend 4 BFs a day until 1 YO.
With DD1 I dropped a day feed about 10-11 months, maybe more 10 months. She had a fab varied diet and plenty of dairy etc and just wasn't interest in the feed after the first nap. We did still have 4 feeds some days but most days she was content with 3 day feeds.
With DD1 I kept 4 milk feeds to over a year as she wasn't so interested in solids.
HTH x