We're dividing 51169390 by 331 
The aim is to understand the frequency of 331 in 51169390.

Let's proceed to step 1:
5 divided by 331 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 331

On to step 2:
When dividing 51 by 331, we get 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 331

Going ahead to step 3:
511 divided by 331 is 1 with a remainder of 180.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 331 from 511 leaves us with 180.
Grab the next digit (6) from the dividend, add it to 180, then carry on: 1806 / 331

Step 4:
331 can be fit into 1806 5 times, resulting in a remainder of 151.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 1655 from 1806 and we're left with 151.
Append the next digit (9) from the dividend to 151 and continue with: 1519 / 331

Going ahead to step 5:
331 goes into 1519 4 times with a remainder of 195.
Use 4 as the next digit of our solution. 
Result so far: 154.0
The remainder is 195 after subtracting 1324 from 1519.
Bring next digit (3) of the dividend behind the 195 and repeat the process: 1953 / 331

Moving on to step 6:
If we divide 1953 by 331, we get 5 and a remainder of 298.
Record the quotient 5 as the next digit in the result. 
Result so far: 1545.0
If we subtract 1655 from 1953, we get 298.
Take the next digit (9) from the dividend and append it to 298, then repeat: 2989 / 331

Step 7:
If we divide 2989 by 331, we get 9 and a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 15459.0
Deduct 2979 from 2989 and we're left with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 331

Going ahead to step 8:
When dividing 100 by 331, we get 0 with a remainder of 100.
The number 0 becomes the next digit in our result. 
Result so far: 154590.0
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Step 9:
If we divide 1000 by 331, we get 3 and a remainder of 7.
The next digit of our result is 3. 
Result so far: 154590.3
Subtract 993 from 1000 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 10:
When dividing 70 by 331, we get 0 with a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 154590.3
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 11:
700 divided by 331 is 2 with a remainder of 38.
Record the quotient 2 as the next digit in the result. 
Result so far: 154590.302
Subtracting 662 from 700 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 12:
The number 331 fits into 380 1 times, leaving a remainder of 49.
The next digit of our result is 1. 
Result so far: 154590.3021
If we subtract 331 from 380, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 13:
When dividing 490 by 331, we get 1 with a remainder of 159.
Use 1 as the next digit of our solution. 
Result so far: 154590.30211
The remainder is 159 after subtracting 331 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

The final outcome is 154590.30211, with a leftover of 0.000159.