We're dividing 51543260 by 523 
The aim is to understand the frequency of 523 in 51543260.

Let's proceed to step 1:
523 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 523

Moving on to step 2:
When dividing 51 by 523, we get 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.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 523

On to step 3:
515 divided by 523 is 0 with a remainder of 515.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 515 after subtracting 0 from 515.
Grab the next digit (4) from the dividend, add it to 515, then carry on: 5154 / 523

Going ahead to step 4:
The number 523 fits into 5154 9 times, leaving a remainder of 447.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 4707 away from 5154, we end up with 447.
Append the next digit (3) from the dividend to 447 and continue with: 4473 / 523

Going ahead to step 5:
523 goes into 4473 8 times with a remainder of 289.
The next digit of our result is 8. 
Result so far: 98.0
Subtracting 4184 from 4473 leaves us with 289.
Append the next digit (2) from the dividend to 289 and continue with: 2892 / 523

Moving on to step 6:
The number 523 fits into 2892 5 times, leaving a remainder of 277.
Use 5 as the next digit of our solution. 
Result so far: 985.0
If we subtract 2615 from 2892, we get 277.
Include the next digit (6) from the dividend after 277, then repeat: 2776 / 523

Step 7:
523 can be fit into 2776 5 times, resulting in a remainder of 161.
Use 5 as the next digit of our solution. 
Result so far: 9855.0
If we take 2615 away from 2776, we end up with 161.
Include the next digit (0) from the dividend after 161, then repeat: 1610 / 523

Moving on to step 8:
The number 523 fits into 1610 3 times, leaving a remainder of 41.
Record the quotient 3 as the next digit in the result. 
Result so far: 98553.0
If we take 1569 away from 1610, we end up with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

On to step 9:
When dividing 410 by 523, we get 0 with a remainder of 410.
The number 0 becomes the next digit in our result. 
Result so far: 98553.0
Subtracting 0 from 410 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 10:
523 goes into 4100 7 times with a remainder of 439.
Record the quotient 7 as the next digit in the result. 
Result so far: 98553.07
Subtract 3661 from 4100 to get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Moving on to step 11:
523 goes into 4390 8 times with a remainder of 206.
Use 8 as the next digit of our solution. 
Result so far: 98553.078
If we take 4184 away from 4390, we end up with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Going ahead to step 12:
2060 divided by 523 is 3 with a remainder of 491.
Write down 3 as next digit of the result. 
Result so far: 98553.0783
The remainder is 491 after subtracting 1569 from 2060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4910, and continue the process.

Moving on to step 13:
If we divide 4910 by 523, we get 9 and a remainder of 203.
Record the quotient 9 as the next digit in the result. 
Result so far: 98553.07839
The remainder is 203 after subtracting 4707 from 4910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Advancing to step 14:
523 can be fit into 2030 3 times, resulting in a remainder of 461.
The next digit of our result is 3. 
Result so far: 98553.078393
Deduct 1569 from 2030 and we're left with 461.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Advancing to step 15:
523 goes into 4610 8 times with a remainder of 426.
Use 8 as the next digit of our solution. 
Result so far: 98553.0783938
If we subtract 4184 from 4610, we get 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

On to step 16:
4260 divided by 523 is 8 with a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 98553.07839388
If we subtract 4184 from 4260, we get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

After the division, we end up with 98553.07839388 and a remainder of 7.6e-08.