Display document count , useful patterns

I have a collection called Students. which has a field it contains the string value ie. Gryffindor, Hufflepuff, Ravenclaw, Slytherin

I am displaying the count of the students in each house

for that I'm doing something like this

G = Students.find({house:'Gryffindor'}).count();
H = Students.find({house:'Hufflepuff'}).count();
R = Students.find({house:'Ravenclaw'}).count();
S = Students.find({house:'Slytherin'}).count();

and displaying.

Is this the best practice or am I doing something wrong. ? Like is there a way that this could be done in a single query ?