About 1 second as this is how long it would take to exhale the breath.
Each breath should last 1 second, and give 1 breath every 3 seconds.
Three seconds.
1 breath about every 3 seconds
2 seconds
Once every three seconds.
1 breath about every 3 seconds
A rescue breath should be given over a period of 1 second.
1 breath every 3 Seconds
Give 1 breath every 3 seconds.
1 breath every 3 seconds
Give breath over a period of 1 second.
For children and infants: once every three seconds For adults: once every five seconds