We divide 21193731 by 326
The aim is to understand the frequency of 326 in 21193731.

Advancing to step 1:
When dividing 2 by 326, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 326

Step 2:
326 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 326

Moving on to step 3:
211 divided by 326 is 0 with a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 211, we get 211.
Append the next digit (9) from the dividend to 211 and continue with: 2119 / 326

Let's proceed to step 4:
326 can be fit into 2119 6 times, resulting in a remainder of 163.
The next digit of our result is 6. 
Result so far: 6.0
Deduct 1956 from 2119 and we're left with 163.
Fetch the next digit (3) from the dividend, attach it to 163 and continue: 1633 / 326

Step 5:
1633 divided by 326 is 5 with a remainder of 3.
Put 5 as the next digit of the answer. 
Result so far: 65.0
The remainder is 3 after subtracting 1630 from 1633.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 326

On to step 6:
If we divide 37 by 326, we get 0 and a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 650.0
Subtracting 0 from 37 leaves us with 37.
Append the next digit (3) from the dividend to 37 and continue with: 373 / 326

Advancing to step 7:
If we divide 373 by 326, we get 1 and a remainder of 47.
Put 1 as the next digit of the answer. 
Result so far: 6501.0
Subtract 326 from 373 to get 47.
Take the next digit (1) from the dividend and append it to 47, then repeat: 471 / 326

Let's proceed to step 8:
When dividing 471 by 326, we get 1 with a remainder of 145.
The next digit of our result is 1. 
Result so far: 65011.0
The remainder is 145 after subtracting 326 from 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 9:
326 goes into 1450 4 times with a remainder of 146.
Use 4 as the next digit of our solution. 
Result so far: 65011.4
If we subtract 1304 from 1450, we get 146.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Step 10:
When dividing 1460 by 326, we get 4 with a remainder of 156.
Record the quotient 4 as the next digit in the result. 
Result so far: 65011.44
If we subtract 1304 from 1460, we get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

After the division, we end up with 65011.44 and a remainder of 0.156.