Do you need to vacuum a lot?

I do not vacumn as often as I should. I am elderly and have back and hip pain if I stand to long or push the vacumn cleaner. There is one short hair dog living in my house plus my longer haired yorki/shitzu mix. I brush her several times a day,, whenever she gets in my lap the brush comes out! That seems to help keep her hair in control and in the waste basket instead of on the carpet and floors. I used to vacumn every other day to keep things in control and not have "hair bunnies" under the furniture, beds and in the corners.