We're picking out our first chicks this month. So many fun choices! Several of the breeds we are looking at are noted as "occasionally" or "infrequently" broody. I was hoping someone could quantify that for me. Does that roughly mean once a month? Once a season? Only months that end in zero? (haha!) I'm sure a lot of it comes down to the individual chicken but a little info would help us narrow down our choices. thx!