53696971 ÷ 551 
The aim is to understand the frequency of 551 in 53696971.

On to step 1:
If we divide 5 by 551, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 551

Advancing to step 2:
When dividing 53 by 551, we get 0 with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Take the next digit (6) from the dividend and append it to 53, then repeat: 536 / 551

Moving on to step 3:
The number 551 fits into 536 0 times, leaving a remainder of 536.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 536 to get 536.
Append the next digit (9) from the dividend to 536 and continue with: 5369 / 551

Moving on to step 4:
When dividing 5369 by 551, we get 9 with a remainder of 410.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtracting 4959 from 5369 leaves us with 410.
Append the next digit (6) from the dividend to 410 and continue with: 4106 / 551

Step 5:
When dividing 4106 by 551, we get 7 with a remainder of 249.
Use 7 as the next digit of our solution. 
Result so far: 97.0
The remainder is 249 after subtracting 3857 from 4106.
Take the next digit (9) from the dividend and append it to 249, then repeat: 2499 / 551

Going ahead to step 6:
The number 551 fits into 2499 4 times, leaving a remainder of 295.
Put 4 as the next digit of the answer. 
Result so far: 974.0
The remainder is 295 after subtracting 2204 from 2499.
Take the next digit (7) from the dividend and append it to 295, then repeat: 2957 / 551

Moving on to step 7:
The number 551 fits into 2957 5 times, leaving a remainder of 202.
Put 5 as the next digit of the answer. 
Result so far: 9745.0
Subtract 2755 from 2957 to get 202.
Append the next digit (1) from the dividend to 202 and continue with: 2021 / 551

Moving on to step 8:
2021 divided by 551 is 3 with a remainder of 368.
Write down 3 as next digit of the result. 
Result so far: 97453.0
If we subtract 1653 from 2021, we get 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 9:
When dividing 3680 by 551, we get 6 with a remainder of 374.
The next digit of our result is 6. 
Result so far: 97453.6
If we subtract 3306 from 3680, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

On to step 10:
When dividing 3740 by 551, we get 6 with a remainder of 434.
Put 6 as the next digit of the answer. 
Result so far: 97453.66
Subtract 3306 from 3740 to get 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

The final result is 97453.66 with a remainder of 0.434.