We're dividing 99578788 by 850 
The aim is to understand the frequency of 850 in 99578788.

Advancing to step 1:
When dividing 9 by 850, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 850

On to step 2:
When dividing 99 by 850, we get 0 with a remainder of 99.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 99 leaves us with 99.
Append the next digit (5) from the dividend to 99 and continue with: 995 / 850

On to step 3:
995 divided by 850 is 1 with a remainder of 145.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 850 from 995 and we're left with 145.
Fetch the next digit (7) from the dividend, attach it to 145 and continue: 1457 / 850

Going ahead to step 4:
850 goes into 1457 1 times with a remainder of 607.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtract 850 from 1457 to get 607.
Include the next digit (8) from the dividend after 607, then repeat: 6078 / 850

Let's proceed to step 5:
6078 divided by 850 is 7 with a remainder of 128.
The next digit of our result is 7. 
Result so far: 117.0
Subtracting 5950 from 6078 leaves us with 128.
Grab the next digit (7) from the dividend, add it to 128, then carry on: 1287 / 850

Moving on to step 6:
If we divide 1287 by 850, we get 1 and a remainder of 437.
The number 1 becomes the next digit in our result. 
Result so far: 1171.0
If we take 850 away from 1287, we end up with 437.
Take the next digit (8) from the dividend and append it to 437, then repeat: 4378 / 850

Step 7:
850 goes into 4378 5 times with a remainder of 128.
The next digit of our result is 5. 
Result so far: 11715.0
If we subtract 4250 from 4378, we get 128.
Take the next digit (8) from the dividend and append it to 128, then repeat: 1288 / 850

Going ahead to step 8:
850 goes into 1288 1 times with a remainder of 438.
Put 1 as the next digit of the answer. 
Result so far: 117151.0
If we take 850 away from 1288, we end up with 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Let's proceed to step 9:
4380 divided by 850 is 5 with a remainder of 130.
Write down 5 as next digit of the result. 
Result so far: 117151.5
If we subtract 4250 from 4380, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 10:
850 goes into 1300 1 times with a remainder of 450.
Write down 1 as next digit of the result. 
Result so far: 117151.51
If we take 850 away from 1300, 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.

Advancing to step 11:
When dividing 4500 by 850, we get 5 with a remainder of 250.
Write down 5 as next digit of the result. 
Result so far: 117151.515
Subtract 4250 from 4500 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 12:
2500 divided by 850 is 2 with a remainder of 800.
Record the quotient 2 as the next digit in the result. 
Result so far: 117151.5152
Deduct 1700 from 2500 and we're left with 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

On to step 13:
8000 divided by 850 is 9 with a remainder of 350.
The number 9 becomes the next digit in our result. 
Result so far: 117151.51529
Subtracting 7650 from 8000 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Advancing to step 14:
If we divide 3500 by 850, we get 4 and a remainder of 100.
The next digit of our result is 4. 
Result so far: 117151.515294
The remainder is 100 after subtracting 3400 from 3500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 15:
850 goes into 1000 1 times with a remainder of 150.
Use 1 as the next digit of our solution. 
Result so far: 117151.5152941
The remainder is 150 after subtracting 850 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 16:
The number 850 fits into 1500 1 times, leaving a remainder of 650.
The next digit of our result is 1. 
Result so far: 117151.51529411
If we take 850 away from 1500, we end up with 650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6500, and continue the process.

The quotient of the division is 117151.51529411, and the remainder is 6.5e-07.