We look at the division of 53972952 by 688 
The aim is to understand the frequency of 688 in 53972952.

Step 1:
688 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 688

Moving on to step 2:
688 can be fit into 53 0 times, resulting in a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Fetch the next digit (9) from the dividend, attach it to 53 and continue: 539 / 688

On to step 3:
688 goes into 539 0 times with a remainder of 539.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 539 to get 539.
Append the next digit (7) from the dividend to 539 and continue with: 5397 / 688

Moving on to step 4:
688 goes into 5397 7 times with a remainder of 581.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 581 after subtracting 4816 from 5397.
Fetch the next digit (2) from the dividend, attach it to 581 and continue: 5812 / 688

Moving on to step 5:
When dividing 5812 by 688, we get 8 with a remainder of 308.
The next digit of our result is 8. 
Result so far: 78.0
Subtracting 5504 from 5812 leaves us with 308.
Take the next digit (9) from the dividend and append it to 308, then repeat: 3089 / 688

Going ahead to step 6:
3089 divided by 688 is 4 with a remainder of 337.
Write down 4 as next digit of the result. 
Result so far: 784.0
The remainder is 337 after subtracting 2752 from 3089.
Bring next digit (5) of the dividend behind the 337 and repeat the process: 3375 / 688

Step 7:
The number 688 fits into 3375 4 times, leaving a remainder of 623.
Record the quotient 4 as the next digit in the result. 
Result so far: 7844.0
If we take 2752 away from 3375, we end up with 623.
Bring next digit (2) of the dividend behind the 623 and repeat the process: 6232 / 688

Going ahead to step 8:
If we divide 6232 by 688, we get 9 and a remainder of 40.
Use 9 as the next digit of our solution. 
Result so far: 78449.0
If we subtract 6192 from 6232, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
400 divided by 688 is 0 with a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 78449.0
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Advancing to step 10:
The number 688 fits into 4000 5 times, leaving a remainder of 560.
The next digit of our result is 5. 
Result so far: 78449.05
If we subtract 3440 from 4000, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 11:
5600 divided by 688 is 8 with a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 78449.058
The remainder is 96 after subtracting 5504 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 12:
The number 688 fits into 960 1 times, leaving a remainder of 272.
The number 1 becomes the next digit in our result. 
Result so far: 78449.0581
The remainder is 272 after subtracting 688 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 13:
When dividing 2720 by 688, we get 3 with a remainder of 656.
Put 3 as the next digit of the answer. 
Result so far: 78449.05813
Subtract 2064 from 2720 to get 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Going ahead to step 14:
The number 688 fits into 6560 9 times, leaving a remainder of 368.
Use 9 as the next digit of our solution. 
Result so far: 78449.058139
If we take 6192 away from 6560, we end up with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Advancing to step 15:
If we divide 3680 by 688, we get 5 and a remainder of 240.
Record the quotient 5 as the next digit in the result. 
Result so far: 78449.0581395
Subtract 3440 from 3680 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 16:
If we divide 2400 by 688, we get 3 and a remainder of 336.
Put 3 as the next digit of the answer. 
Result so far: 78449.05813953
The remainder is 336 after subtracting 2064 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

The final result is 78449.05813953 with a remainder of 3.36e-07.