Answer:
No matter how little or how much you use me, you change me every month.
who do you think you know but sometimes you don't
I have a face, yet no senses. But I don't really care, because time is of the essence.
My first is twice in apple but not once in tart. My second is in liver but not in heart. My third is in giant and also in ghost. Whole Iām best when I am roast.
When the horse strokes the cat, the wood begins to sing.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.