Histogram, importing text file

[Oper]

Hello,

I need to draw a histogram from a large amount of data, over 300k lines
like:

value1
value2
etc.

It's too much to import into one column, how can I split it into multiple
columns? And still be able to use frequency() of course I can easily
have my input formed like:

value1, no_of_occurences1
value2, no_of_occurences2
....
which would dramatically reduce the number of rows, but it seems to be
unusable with frequency().

Any ideas?

Regards
Piotr Babula