We look at the division of 64349790 by 715 
The aim is to understand the frequency of 715 in 64349790.

On to step 1:
6 divided by 715 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 715

Moving on to step 2:
If we divide 64 by 715, we get 0 and a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Take the next digit (3) from the dividend and append it to 64, then repeat: 643 / 715

Let's proceed to step 3:
When dividing 643 by 715, we get 0 with a remainder of 643.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 643, we end up with 643.
Take the next digit (4) from the dividend and append it to 643, then repeat: 6434 / 715

On to step 4:
715 can be fit into 6434 8 times, resulting in a remainder of 714.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 5720 from 6434, we get 714.
Grab the next digit (9) from the dividend, add it to 714, then carry on: 7149 / 715

On to step 5:
715 can be fit into 7149 9 times, resulting in a remainder of 714.
Put 9 as the next digit of the answer. 
Result so far: 89.0
Subtract 6435 from 7149 to get 714.
Fetch the next digit (7) from the dividend, attach it to 714 and continue: 7147 / 715

On to step 6:
If we divide 7147 by 715, we get 9 and a remainder of 712.
The next digit of our result is 9. 
Result so far: 899.0
The remainder is 712 after subtracting 6435 from 7147.
Append the next digit (9) from the dividend to 712 and continue with: 7129 / 715

Going ahead to step 7:
715 can be fit into 7129 9 times, resulting in a remainder of 694.
Write down 9 as next digit of the result. 
Result so far: 8999.0
If we take 6435 away from 7129, we end up with 694.
Append the next digit (0) from the dividend to 694 and continue with: 6940 / 715

Going ahead to step 8:
715 can be fit into 6940 9 times, resulting in a remainder of 505.
Put 9 as the next digit of the answer. 
Result so far: 89999.0
The remainder is 505 after subtracting 6435 from 6940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

On to step 9:
When dividing 5050 by 715, we get 7 with a remainder of 45.
The next digit of our result is 7. 
Result so far: 89999.7
Subtract 5005 from 5050 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 10:
450 divided by 715 is 0 with a remainder of 450.
Put 0 as the next digit of the answer. 
Result so far: 89999.7
The remainder is 450 after subtracting 0 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

On to step 11:
If we divide 4500 by 715, we get 6 and a remainder of 210.
The number 6 becomes the next digit in our result. 
Result so far: 89999.706
Deduct 4290 from 4500 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Moving on to step 12:
When dividing 2100 by 715, we get 2 with a remainder of 670.
Use 2 as the next digit of our solution. 
Result so far: 89999.7062
If we take 1430 away from 2100, we end up with 670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6700, and continue the process.

On to step 13:
When dividing 6700 by 715, we get 9 with a remainder of 265.
The number 9 becomes the next digit in our result. 
Result so far: 89999.70629
The remainder is 265 after subtracting 6435 from 6700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Step 14:
When dividing 2650 by 715, we get 3 with a remainder of 505.
Write down 3 as next digit of the result. 
Result so far: 89999.706293
Deduct 2145 from 2650 and we're left with 505.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Moving on to step 15:
5050 divided by 715 is 7 with a remainder of 45.
The number 7 becomes the next digit in our result. 
Result so far: 89999.7062937
If we take 5005 away from 5050, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 16:
If we divide 450 by 715, we get 0 and a remainder of 450.
The number 0 becomes the next digit in our result. 
Result so far: 89999.7062937
If we take 0 away from 450, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

After the division, we end up with 89999.7062937 and a remainder of 4.5e-07.