Frequency: The word is one of the 3000 most common words in English.
1.
You use everywhere to refer to a whole area or to all the places in a particular area.
Working people everywhere object to paying taxes...
We went everywhere together...
Dust is everywhere...
People come here from everywhere to see these lights.
ADV: n ADV, ADV after v, be ADV, oft from ADV, ADV cl/group
2.
You use everywhere to refer to all the places that someone goes to.
Bradley is still accustomed to travelling everywhere in style...
Everywhere he went he was introduced as the current United States Open Champion.
ADV: ADV after v, oft ADV cl/prep
3.
You use everywhere to emphasize that you are talking about a large number of places, or all possible places.
I saw her picture everywhere...
I looked everywhere. I couldn't find him.
ADV: ADV after v, be ADV, ADV with cl [emphasis]
4.
If you say that someone or something is everywhere, you mean that they are present in a place in very large numbers.
There were cartons of cigarettes everywhere...
ADV: be ADV, ADV after v