As an expert in emergency medical response, I can tell you that the frequency of giving rescue breaths during CPR (Cardiopulmonary Resuscitation) has been standardized to ensure effectiveness and simplicity for those performing the procedure. The current guidelines recommend a ratio of 30 chest compressions to 2 rescue breaths for adults, children, and infants. During CPR, you should start with 30 chest compressions, which helps to circulate blood through the body. After these compressions, you should open the airway using the head-tilt/chin-lift technique. Then, you give 2 rescue breaths. Each rescue breath should be about 1 second long and should result in the chest clearly rising. These two breaths are given one after the other. It's important to note that the focus of CPR has shifted from primarily providing rescue breaths to emphasizing chest compressions, as they have been found to be more critical in maintaining blood flow to the heart and brain. read more >>

Once you have given 30 compressions, open the airway using the head-tilt/chin-lift technique and give 2 rescue breaths. Each rescue breath should last about 1 second and make the chest clearly rise. Open the airway and give rescue breaths, one after the other.read more >>