how many times should an elderly person breath  a minute while sleeping
The ideal breathing pattern at rest is 3 breaths/min, 1.5-2 L/min for minute ventilation, and 180 s for the stress-free breath holding time test (optimum or ideal body oxygenation). The inhalation is about 1.5 s, exhalation 2.5 s, and the automatic pause (natural pause of relaxation with no breathing) is up to 16 s.