The plant produces a (great/large/huge) 'mass of' blossoms every spring. = The plant produces 'masses of' blossoms every spring.
The mayor is trying to encourage more commuters to use 'mass transit' in order to alleviate traffic in the city.
His policies are supported by 'the' (great/broad) 'mass of' the people. [=by most of the people]
(..) - I let him. - Then I am Queen again! Judith, have you any news of your husband or of Alfred? No, Sire. There is no news. We must hold a special mass to pray for them. But I know the boy is safe. Athelstan walks beside him, every step, every mile. Of that, I am most certain. And now, forgive me. I (..)2016 TvShow: Vikings Title: Portage Season: 4 Episode 8