Will having sex restore my reduced libido?

I am 47 and have sex with my husband a couple of times a month, but recently my libido has benn diminishing. 

I struggle to get in the mood and it takes me longer to have an orgasm. Should I blame this on my age? I have read that getting out of the habit decreases your libido. Will having sex more frequently help?

This could be related to perimenopause, which generally begins in the mid- to late-40s — it can be associated with a decrease in desire and difficulty achieving orgasm. During the transition to menopause, the sex hormones (oestrogen, progesterone and testosterone) begin to fluctuate and, over a four-year period, they progressively decline until menstruation stops.