Statistics
`HELP..HELP..HELP`
(What is it? How does it work?)
`Prepare a new Pattern`
Which fields to count, in what way?

`Select a Pattern`
from previously prepared files

`Evaluate Current Result Set`
Apply the selected pattern, %#uwQ 
to the current result set.  

`Evaluate Entire Database`
Count the elements in the all records

Special cases:       `Tag statistics`   `Subfield count`

?Prepare a new Pattern=x var "X ctstart"`ins #uX9`h ctteng
?Select a Pattern=X ctpick
?Evaluate Current Result Set=x var ""\ins #uwF\exec X ctprod
?Evaluate Entire Database=x var "G"\ins #uwF\exec X ctprod
?HELP..HELP..HELP=h cth
?Tag statistics=x var "K"\ins #uwS\exec X ctprod
?Subfield count=x var "T"\ins #uwS\exec X ctprod