How to you monitor your COPD

Hi, I'm taking care of my dad who was diagnosed with Severe COPD - Emphysema 13 years ago, since I'm somehow in-charge of his health, I want to monitor his COPD closely to get early intervention and to prevent severe exacerbation which leads to further decrease in lung function.

so i want to ask if how do you monitor your status on a day to day basis

how many times in a day do you monitor your O2, heart rate, BP etc.?

Thanks!