Darcy started talking about 10 months. (please don't think I'm bragging - but you asked for variance). I a weekend she could all of a sudden say Mum, Nan and Bird.
She'd say close to 200 words rights now: colours can count to 10, songs, the toys names , food etc. I have no idea how either as it's just her and I - maybe that's it - I need someone else to talk to lol.