Creating Labels and Frequency list style reports in SAS code

Hello, I am trying to create labels for a few variables and then create frequency list style reports (not tables).

In the below  SAS code I am attempting to use var6* and var10 variable and apply labels to all frequencies output as applicable.
Note: * = data1, data2, or data3.  

title 'Match Data1, Data2, Data3 Comparison' ;

/* Creating Labels */

data dir1.output2;
  set dir1.output;
  LABEL  if var6data1 = D then 'Duplicate'
         if var6data1 = B then 'Bad Match' 
         if var6data1 = N then 'New Match'
         if var6data2 = D then 'Duplicate'
         if var6data2 = B then 'Bad Match' 
         if var6data2 = N then 'New Match'
         if var6data3 = D then 'Duplicate'
         if var6data3 = B then 'Bad Match' 
         if var6data3 = N then 'New Match';
run;

data dir1.output3;
  set dir1.output2;
  LABEL if var10 = 1 then 'All'
        if var10 = 2 then 'Data1-Data2'
        if var10 = 3 then 'Data1';
run;


/* Frequency of var10 and var6data1 by var6data2 by var6data3 variables in the code below */

proc freq data=dir1.output3;
  tables var10 / missing out=frequency.lis;
    title 'Frequency of Var10';
run;
           
proc freq data=dir1.output3;
  tables var6data1*var6data2*var6data3 / missing out=frequency.lis;
    title 'var6 Comparison';
run;    

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Questions:
Is my code correct? Is there a better way of creating  labels for these variables and then creating/outputting frequencies?  How may I assign each label to a correct frequency output?
Since my input datasets contain 100 thousands of records I am looking for the most sufficient way possible.  

Thank you in advance!