Tsur is a character counter tool.
# count all ascii characters in text.txt
# and output in (default) ascending order, by value
tsur -f text.txt count -c
# count all ascii characters in text.txt
# and output in descending order, by values
tsur -f text.txt count -c -s vdesc
# count all ascii characters in text.txt
# and output in descending order, by keys
tsur -f text.txt count -c -s kdesc
# count all ascii characters in text.txt
# and output in ascending order, by keys
tsur -f text.txt count -c -s vasc
# cout all ascii characters in t1.txt t2.txt
# and output in ascending order, by values
tsur -f t1.txt t2.txt count -c