15602921 ÷ 679 
The aim is to understand the frequency of 679 in 15602921.

Step 1:
The number 679 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 679

Step 2:
679 can be fit into 15 0 times, resulting in a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Grab the next digit (6) from the dividend, add it to 15, then carry on: 156 / 679

On to step 3:
If we divide 156 by 679, we get 0 and a remainder of 156.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 156 after subtracting 0 from 156.
Include the next digit (0) from the dividend after 156, then repeat: 1560 / 679

Going ahead to step 4:
1560 divided by 679 is 2 with a remainder of 202.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 1358 away from 1560, we end up with 202.
Take the next digit (2) from the dividend and append it to 202, then repeat: 2022 / 679

Moving on to step 5:
When dividing 2022 by 679, we get 2 with a remainder of 664.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
If we subtract 1358 from 2022, we get 664.
Include the next digit (9) from the dividend after 664, then repeat: 6649 / 679

Step 6:
679 goes into 6649 9 times with a remainder of 538.
Record the quotient 9 as the next digit in the result. 
Result so far: 229.0
Subtract 6111 from 6649 to get 538.
Append the next digit (2) from the dividend to 538 and continue with: 5382 / 679

Advancing to step 7:
679 can be fit into 5382 7 times, resulting in a remainder of 629.
The next digit of our result is 7. 
Result so far: 2297.0
If we take 4753 away from 5382, we end up with 629.
Append the next digit (1) from the dividend to 629 and continue with: 6291 / 679

Step 8:
The number 679 fits into 6291 9 times, leaving a remainder of 180.
Write down 9 as next digit of the result. 
Result so far: 22979.0
Subtracting 6111 from 6291 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 9:
If we divide 1800 by 679, we get 2 and a remainder of 442.
The number 2 becomes the next digit in our result. 
Result so far: 22979.2
If we subtract 1358 from 1800, we get 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

On to step 10:
4420 divided by 679 is 6 with a remainder of 346.
Put 6 as the next digit of the answer. 
Result so far: 22979.26
Subtract 4074 from 4420 to get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

Going ahead to step 11:
3460 divided by 679 is 5 with a remainder of 65.
The next digit of our result is 5. 
Result so far: 22979.265
Subtracting 3395 from 3460 leaves us with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Moving on to step 12:
When dividing 650 by 679, we get 0 with a remainder of 650.
Use 0 as the next digit of our solution. 
Result so far: 22979.265
Deduct 0 from 650 and we're left with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

On to step 13:
The number 679 fits into 6500 9 times, leaving a remainder of 389.
Use 9 as the next digit of our solution. 
Result so far: 22979.26509
If we take 6111 away from 6500, we end up with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Let's proceed to step 14:
679 can be fit into 3890 5 times, resulting in a remainder of 495.
The number 5 becomes the next digit in our result. 
Result so far: 22979.265095
Deduct 3395 from 3890 and we're left with 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Step 15:
If we divide 4950 by 679, we get 7 and a remainder of 197.
Use 7 as the next digit of our solution. 
Result so far: 22979.2650957
If we take 4753 away from 4950, we end up with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 16:
The number 679 fits into 1970 2 times, leaving a remainder of 612.
Record the quotient 2 as the next digit in the result. 
Result so far: 22979.26509572
If we subtract 1358 from 1970, we get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Our division results in 22979.26509572 with a remaining 6.12e-07.