MySQL order by COUNT DISTINCT

2.8.7
2.8.3
2.8.2
2.8.7
2.8.5
2.8.7
2.8.7
2.8.5
2.6.0
2.8.3
2.6.4
2.6.3
2.8.4
2.8.0
2.6.3
2.8.5
2.8.5
2.8.5
2.6.0
2.8.2

How do I bring a unique value version sorted by the number of these versions?

At the exit I want to get the following:

2.8.5 5

2.8.7 4

2.6.0 2

2.6.3 2

2.8.2 2

2.8.3 2

2.8.4 2

2.6.4 1

2.8.0 1

ORDER BY count unique versions))

Sorry for my bad english