Let's divide 98723777 by 15
The aim is to understand the frequency of 15 in 98723777.

Moving on to step 1:
15 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 15

Going ahead to step 2:
If we divide 98 by 15, we get 6 and a remainder of 8.
The next digit of our result is 6. 
Result so far: 6.0
Subtracting 90 from 98 leaves us with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 15

Advancing to step 3:
If we divide 87 by 15, we get 5 and a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 65.0
If we subtract 75 from 87, we get 12.
Take the next digit (2) from the dividend and append it to 12, then repeat: 122 / 15

Step 4:
If we divide 122 by 15, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 658.0
The remainder is 2 after subtracting 120 from 122.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 15

Advancing to step 5:
If we divide 23 by 15, we get 1 and a remainder of 8.
The next digit of our result is 1. 
Result so far: 6581.0
The remainder is 8 after subtracting 15 from 23.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 15

Advancing to step 6:
15 can be fit into 87 5 times, resulting in a remainder of 12.
Put 5 as the next digit of the answer. 
Result so far: 65815.0
Subtract 75 from 87 to get 12.
Take the next digit (7) from the dividend and append it to 12, then repeat: 127 / 15

Step 7:
15 can be fit into 127 8 times, resulting in a remainder of 7.
The number 8 becomes the next digit in our result. 
Result so far: 658158.0
Subtracting 120 from 127 leaves us with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 15

Going ahead to step 8:
If we divide 77 by 15, we get 5 and a remainder of 2.
Record the quotient 5 as the next digit in the result. 
Result so far: 6581585.0
The remainder is 2 after subtracting 75 from 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
20 divided by 15 is 1 with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 6581585.1
If we subtract 15 from 20, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 10:
50 divided by 15 is 3 with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 6581585.13
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 11:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 6581585.133
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 6581585.133, and the remainder is 0.0005.