I've recently heard a phrase 'heavy accent' used by a student of English. At first this combination of words seemed OK to me. But I have later checked a Oxford collocations dictionary and couldn't find such a collocation there. The usages suggested in the dictionary are 'broad, marked, pronounced, strong, thick'.
Does it mean that 'heavy accent' is not really a good collocation?
If you want Russian equivalents they are 'сильный, ярковыраженный, заметный акцент'.
Thanks