Let's divide 15679349 by 840
The aim is to understand the frequency of 840 in 15679349.

Advancing to step 1:
The number 840 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
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 840

Let's proceed to step 2:
The number 840 fits into 15 0 times, leaving a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Include the next digit (6) from the dividend after 15, then repeat: 156 / 840

Let's proceed to step 3:
If we divide 156 by 840, we get 0 and a remainder of 156.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 156 after subtracting 0 from 156.
Fetch the next digit (7) from the dividend, attach it to 156 and continue: 1567 / 840

Going ahead to step 4:
If we divide 1567 by 840, we get 1 and a remainder of 727.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 840 from 1567 to get 727.
Bring next digit (9) of the dividend behind the 727 and repeat the process: 7279 / 840

Step 5:
When dividing 7279 by 840, we get 8 with a remainder of 559.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 6720 from 7279 and we're left with 559.
Append the next digit (3) from the dividend to 559 and continue with: 5593 / 840

Advancing to step 6:
When dividing 5593 by 840, we get 6 with a remainder of 553.
The next digit of our result is 6. 
Result so far: 186.0
Subtract 5040 from 5593 to get 553.
Take the next digit (4) from the dividend and append it to 553, then repeat: 5534 / 840

Advancing to step 7:
When dividing 5534 by 840, we get 6 with a remainder of 494.
The number 6 becomes the next digit in our result. 
Result so far: 1866.0
Subtract 5040 from 5534 to get 494.
Take the next digit (9) from the dividend and append it to 494, then repeat: 4949 / 840

Moving on to step 8:
840 goes into 4949 5 times with a remainder of 749.
Put 5 as the next digit of the answer. 
Result so far: 18665.0
The remainder is 749 after subtracting 4200 from 4949.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7490, and continue the process.

Advancing to step 9:
840 goes into 7490 8 times with a remainder of 770.
Write down 8 as next digit of the result. 
Result so far: 18665.8
The remainder is 770 after subtracting 6720 from 7490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

On to step 10:
840 can be fit into 7700 9 times, resulting in a remainder of 140.
Use 9 as the next digit of our solution. 
Result so far: 18665.89
Deduct 7560 from 7700 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 11:
The number 840 fits into 1400 1 times, leaving a remainder of 560.
Record the quotient 1 as the next digit in the result. 
Result so far: 18665.891
Subtract 840 from 1400 to 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.

On to step 12:
When dividing 5600 by 840, we get 6 with a remainder of 560.
The number 6 becomes the next digit in our result. 
Result so far: 18665.8916
Subtracting 5040 from 5600 leaves us with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Moving on to step 13:
If we divide 5600 by 840, we get 6 and a remainder of 560.
The next digit of our result is 6. 
Result so far: 18665.89166
If we subtract 5040 from 5600, 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.

After the division, we end up with 18665.89166 and a remainder of 0.00056.