We look at the division of 58215596 by 688 
The aim is to understand the frequency of 688 in 58215596.

Advancing to step 1:
When dividing 5 by 688, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 688

On to step 2:
58 divided by 688 is 0 with a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 58, we get 58.
Grab the next digit (2) from the dividend, add it to 58, then carry on: 582 / 688

Going ahead to step 3:
582 divided by 688 is 0 with a remainder of 582.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 582, we get 582.
Take the next digit (1) from the dividend and append it to 582, then repeat: 5821 / 688

Moving on to step 4:
The number 688 fits into 5821 8 times, leaving a remainder of 317.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 5504 away from 5821, we end up with 317.
Include the next digit (5) from the dividend after 317, then repeat: 3175 / 688

Going ahead to step 5:
3175 divided by 688 is 4 with a remainder of 423.
Use 4 as the next digit of our solution. 
Result so far: 84.0
If we take 2752 away from 3175, we end up with 423.
Take the next digit (5) from the dividend and append it to 423, then repeat: 4235 / 688

Step 6:
If we divide 4235 by 688, we get 6 and a remainder of 107.
Record the quotient 6 as the next digit in the result. 
Result so far: 846.0
Subtract 4128 from 4235 to get 107.
Append the next digit (9) from the dividend to 107 and continue with: 1079 / 688

On to step 7:
688 can be fit into 1079 1 times, resulting in a remainder of 391.
Use 1 as the next digit of our solution. 
Result so far: 8461.0
If we take 688 away from 1079, we end up with 391.
Fetch the next digit (6) from the dividend, attach it to 391 and continue: 3916 / 688

On to step 8:
When dividing 3916 by 688, we get 5 with a remainder of 476.
Put 5 as the next digit of the answer. 
Result so far: 84615.0
Subtracting 3440 from 3916 leaves us with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Going ahead to step 9:
4760 divided by 688 is 6 with a remainder of 632.
Put 6 as the next digit of the answer. 
Result so far: 84615.6
Subtract 4128 from 4760 to get 632.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6320, and continue the process.

On to step 10:
When dividing 6320 by 688, we get 9 with a remainder of 128.
The next digit of our result is 9. 
Result so far: 84615.69
Subtract 6192 from 6320 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 11:
When dividing 1280 by 688, we get 1 with a remainder of 592.
Record the quotient 1 as the next digit in the result. 
Result so far: 84615.691
If we subtract 688 from 1280, we get 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Going ahead to step 12:
The number 688 fits into 5920 8 times, leaving a remainder of 416.
Use 8 as the next digit of our solution. 
Result so far: 84615.6918
If we subtract 5504 from 5920, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Going ahead to step 13:
If we divide 4160 by 688, we get 6 and a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 84615.69186
If we take 4128 away from 4160, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 14:
688 goes into 320 0 times with a remainder of 320.
The number 0 becomes the next digit in our result. 
Result so far: 84615.69186
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 15:
688 can be fit into 3200 4 times, resulting in a remainder of 448.
The next digit of our result is 4. 
Result so far: 84615.6918604
Subtract 2752 from 3200 to get 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Moving on to step 16:
4480 divided by 688 is 6 with a remainder of 352.
Record the quotient 6 as the next digit in the result. 
Result so far: 84615.69186046
Subtracting 4128 from 4480 leaves us with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

After the division, we end up with 84615.69186046 and a remainder of 3.52e-07.