Rate showing as of 2m

I am using grafana with prometheus in kubernetes.
The question I have is why a query like this shows no data when set to 1m but at 2m it does?

sum (rate (container_network_receive_bytes_total{kubernetes_io_hostname=~"^$Node$"}[2m]))

Maybe because data is not collected at lower than 2m intervals? Not sure what could be the cause. Any info in the prometheus docs that could explain it?