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 Sagunto was created in 1974.
BM Aragón was created in 2003.
BM Granollers was created in 1944.
BM Antequera was created in 1994.
BM Huesca was created in 1995.
BM Valladolid was created in 1991.
BM Altea ended in 2008.
BM Altea was created in 1974.
BM Alcobendas was created in 1994.
Toledo BM ended in 2012.