Roman Catholics cover only 13.5% of the OT if they attend Sundays and weekdays....3.7% if attend Sunday and Major Feasts.
For the NT the results are 71.5% and 40.8% respectively.
And this is important....this is after Vatican II.
Prior to Vatican II Roman Catholics only heard 16.5% of the NT and 1.0% of the OT.
http://catholic-resources.org/Lectionary/Statistics.htm
Even if there is when a certain amount scripture is covered that is okay. Better to get a slice then no scripture at all.