We look at the division of 51441181 by 369 
The aim is to understand the frequency of 369 in 51441181.

Let's proceed to step 1:
5 divided by 369 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 369

Let's proceed to step 2:
51 divided by 369 is 0 with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Append the next digit (4) from the dividend to 51 and continue with: 514 / 369

Let's proceed to step 3:
When dividing 514 by 369, we get 1 with a remainder of 145.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 369 from 514 and we're left with 145.
Include the next digit (4) from the dividend after 145, then repeat: 1454 / 369

Step 4:
1454 divided by 369 is 3 with a remainder of 347.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtracting 1107 from 1454 leaves us with 347.
Take the next digit (1) from the dividend and append it to 347, then repeat: 3471 / 369

Let's proceed to step 5:
3471 divided by 369 is 9 with a remainder of 150.
The number 9 becomes the next digit in our result. 
Result so far: 139.0
Subtract 3321 from 3471 to get 150.
Bring next digit (1) of the dividend behind the 150 and repeat the process: 1501 / 369

Going ahead to step 6:
The number 369 fits into 1501 4 times, leaving a remainder of 25.
The next digit of our result is 4. 
Result so far: 1394.0
If we take 1476 away from 1501, we end up with 25.
Bring next digit (8) of the dividend behind the 25 and repeat the process: 258 / 369

Moving on to step 7:
369 goes into 258 0 times with a remainder of 258.
Use 0 as the next digit of our solution. 
Result so far: 13940.0
The remainder is 258 after subtracting 0 from 258.
Append the next digit (1) from the dividend to 258 and continue with: 2581 / 369

Moving on to step 8:
369 can be fit into 2581 6 times, resulting in a remainder of 367.
The next digit of our result is 6. 
Result so far: 139406.0
If we subtract 2214 from 2581, we get 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

Step 9:
369 can be fit into 3670 9 times, resulting in a remainder of 349.
The next digit of our result is 9. 
Result so far: 139406.9
If we subtract 3321 from 3670, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Moving on to step 10:
The number 369 fits into 3490 9 times, leaving a remainder of 169.
The next digit of our result is 9. 
Result so far: 139406.99
If we take 3321 away from 3490, we end up with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

In conclusion, the division gives 139406.99 with a balance of 0.169.