We're dividing 13532721 by 336 
The aim is to understand the frequency of 336 in 13532721.

On to step 1:
The number 336 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 336

Going ahead to step 2:
When dividing 13 by 336, we get 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 13, we get 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 336

Advancing to step 3:
When dividing 135 by 336, we get 0 with a remainder of 135.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 135 leaves us with 135.
Include the next digit (3) from the dividend after 135, then repeat: 1353 / 336

Step 4:
1353 divided by 336 is 4 with a remainder of 9.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 1344 away from 1353, we end up with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 336

Going ahead to step 5:
If we divide 92 by 336, we get 0 and a remainder of 92.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we subtract 0 from 92, we get 92.
Include the next digit (7) from the dividend after 92, then repeat: 927 / 336

Moving on to step 6:
336 goes into 927 2 times with a remainder of 255.
Write down 2 as next digit of the result. 
Result so far: 402.0
If we take 672 away from 927, we end up with 255.
Grab the next digit (2) from the dividend, add it to 255, then carry on: 2552 / 336

Going ahead to step 7:
If we divide 2552 by 336, we get 7 and a remainder of 200.
Put 7 as the next digit of the answer. 
Result so far: 4027.0
Deduct 2352 from 2552 and we're left with 200.
Fetch the next digit (1) from the dividend, attach it to 200 and continue: 2001 / 336

Step 8:
If we divide 2001 by 336, we get 5 and a remainder of 321.
Record the quotient 5 as the next digit in the result. 
Result so far: 40275.0
Subtract 1680 from 2001 to get 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Going ahead to step 9:
The number 336 fits into 3210 9 times, leaving a remainder of 186.
Record the quotient 9 as the next digit in the result. 
Result so far: 40275.9
Subtracting 3024 from 3210 leaves us with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Moving on to step 10:
If we divide 1860 by 336, we get 5 and a remainder of 180.
The number 5 becomes the next digit in our result. 
Result so far: 40275.95
Deduct 1680 from 1860 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 11:
336 can be fit into 1800 5 times, resulting in a remainder of 120.
Write down 5 as next digit of the result. 
Result so far: 40275.955
Subtracting 1680 from 1800 leaves us with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final outcome is 40275.955, with a leftover of 0.012.