We look at the division of 877777 by 615 
The aim is to understand the frequency of 615 in 877777.

Going ahead to step 1:
When dividing 8 by 615, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 615

Advancing to step 2:
The number 615 fits into 87 0 times, leaving a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Append the next digit (7) from the dividend to 87 and continue with: 877 / 615

Going ahead to step 3:
If we divide 877 by 615, we get 1 and a remainder of 262.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 615 from 877 leaves us with 262.
Fetch the next digit (7) from the dividend, attach it to 262 and continue: 2627 / 615

Moving on to step 4:
615 can be fit into 2627 4 times, resulting in a remainder of 167.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we take 2460 away from 2627, we end up with 167.
Include the next digit (7) from the dividend after 167, then repeat: 1677 / 615

Moving on to step 5:
615 can be fit into 1677 2 times, resulting in a remainder of 447.
Put 2 as the next digit of the answer. 
Result so far: 142.0
If we subtract 1230 from 1677, we get 447.
Grab the next digit (7) from the dividend, add it to 447, then carry on: 4477 / 615

On to step 6:
If we divide 4477 by 615, we get 7 and a remainder of 172.
Record the quotient 7 as the next digit in the result. 
Result so far: 1427.0
If we take 4305 away from 4477, we end up with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

On to step 7:
615 goes into 1720 2 times with a remainder of 490.
Write down 2 as next digit of the result. 
Result so far: 1427.2
If we subtract 1230 from 1720, we get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Advancing to step 8:
If we divide 4900 by 615, we get 7 and a remainder of 595.
Write down 7 as next digit of the result. 
Result so far: 1427.27
The remainder is 595 after subtracting 4305 from 4900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Let's proceed to step 9:
615 can be fit into 5950 9 times, resulting in a remainder of 415.
Record the quotient 9 as the next digit in the result. 
Result so far: 1427.279
If we take 5535 away from 5950, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Moving on to step 10:
615 goes into 4150 6 times with a remainder of 460.
Write down 6 as next digit of the result. 
Result so far: 1427.2796
The remainder is 460 after subtracting 3690 from 4150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 11:
If we divide 4600 by 615, we get 7 and a remainder of 295.
The next digit of our result is 7. 
Result so far: 1427.27967
The remainder is 295 after subtracting 4305 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

On to step 12:
615 can be fit into 2950 4 times, resulting in a remainder of 490.
Record the quotient 4 as the next digit in the result. 
Result so far: 1427.279674
Subtracting 2460 from 2950 leaves us with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Let's proceed to step 13:
If we divide 4900 by 615, we get 7 and a remainder of 595.
Use 7 as the next digit of our solution. 
Result so far: 1427.2796747
The remainder is 595 after subtracting 4305 from 4900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

On to step 14:
When dividing 5950 by 615, we get 9 with a remainder of 415.
Write down 9 as next digit of the result. 
Result so far: 1427.27967479
If we take 5535 away from 5950, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

The quotient of the division is 1427.27967479, and the remainder is 4.15e-07.