681858 divided by 15 
The aim is to understand the frequency of 15 in 681858.

Moving on to step 1:
15 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (8) from the dividend, add it to 6, then carry on: 68 / 15

Let's proceed to step 2:
If we divide 68 by 15, we get 4 and a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Subtracting 60 from 68 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 15

Step 3:
81 divided by 15 is 5 with a remainder of 6.
Put 5 as the next digit of the answer. 
Result so far: 45.0
If we subtract 75 from 81, we get 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 15

Going ahead to step 4:
15 goes into 68 4 times with a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 454.0
If we take 60 away from 68, we end up with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 15

Advancing to step 5:
85 divided by 15 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 4545.0
If we take 75 away from 85, we end up with 10.
Append the next digit (8) from the dividend to 10 and continue with: 108 / 15

Advancing to step 6:
The number 15 fits into 108 7 times, leaving a remainder of 3.
Use 7 as the next digit of our solution. 
Result so far: 45457.0
Deduct 105 from 108 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
The number 15 fits into 30 2 times, leaving a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 45457.2
Deduct 30 from 30 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
When dividing 0 by 15, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 45457.2
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
0 divided by 15 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 45457.2
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 45457.2 with a remainder of 0.0.