It depends on the person. Significantly less than 1/2 (that is, one every two days) is abnormal, and signifcantly more than 3 per day is also abnormal (for adults ... infants may have more frequent ones).
If your "usual pattern" changes and you can't immediately think of a good reason for it, you should probably see a physician.
Heavy BM in the morning, with a lighter BM in the late afternoon.
yes
BM Huesca was created in 1995.
BM Aragón was created in 2003.
BM Valladolid was created in 1991.
BM Alcobendas was created in 1994.
BM Antequera was created in 1994.
BM Remudas was created in 1978.
Algeciras BM was created in 1974.
BM Granollers was created in 1944.
BM Neptuno was created in 2011.
BM Altea ended in 2008.