71903401 divided by 615 
The aim is to understand the frequency of 615 in 71903401.

Advancing to step 1:
615 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 615

Let's proceed to step 2:
If we divide 71 by 615, we get 0 and a remainder of 71.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 71 and we're left with 71.
Include the next digit (9) from the dividend after 71, then repeat: 719 / 615

Going ahead to step 3:
If we divide 719 by 615, we get 1 and a remainder of 104.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 104 after subtracting 615 from 719.
Fetch the next digit (0) from the dividend, attach it to 104 and continue: 1040 / 615

On to step 4:
The number 615 fits into 1040 1 times, leaving a remainder of 425.
The next digit of our result is 1. 
Result so far: 11.0
Subtracting 615 from 1040 leaves us with 425.
Append the next digit (3) from the dividend to 425 and continue with: 4253 / 615

On to step 5:
615 goes into 4253 6 times with a remainder of 563.
Write down 6 as next digit of the result. 
Result so far: 116.0
The remainder is 563 after subtracting 3690 from 4253.
Grab the next digit (4) from the dividend, add it to 563, then carry on: 5634 / 615

Going ahead to step 6:
If we divide 5634 by 615, we get 9 and a remainder of 99.
Put 9 as the next digit of the answer. 
Result so far: 1169.0
Deduct 5535 from 5634 and we're left with 99.
Fetch the next digit (0) from the dividend, attach it to 99 and continue: 990 / 615

Step 7:
When dividing 990 by 615, we get 1 with a remainder of 375.
The next digit of our result is 1. 
Result so far: 11691.0
If we take 615 away from 990, we end up with 375.
Grab the next digit (1) from the dividend, add it to 375, then carry on: 3751 / 615

Step 8:
The number 615 fits into 3751 6 times, leaving a remainder of 61.
Put 6 as the next digit of the answer. 
Result so far: 116916.0
Subtracting 3690 from 3751 leaves us with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 9:
If we divide 610 by 615, we get 0 and a remainder of 610.
The next digit of our result is 0. 
Result so far: 116916.0
Subtracting 0 from 610 leaves us with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

On to step 10:
615 goes into 6100 9 times with a remainder of 565.
The number 9 becomes the next digit in our result. 
Result so far: 116916.09
If we take 5535 away from 6100, we end up with 565.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5650, and continue the process.

Moving on to step 11:
When dividing 5650 by 615, we get 9 with a remainder of 115.
Record the quotient 9 as the next digit in the result. 
Result so far: 116916.099
Subtract 5535 from 5650 to get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

The quotient of the division is 116916.099, and the remainder is 0.0115.