99791138 ÷ 901 
The aim is to understand the frequency of 901 in 99791138.

On to step 1:
901 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 901

Step 2:
901 can be fit into 99 0 times, resulting in a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 99, we end up with 99.
Take the next digit (7) from the dividend and append it to 99, then repeat: 997 / 901

Going ahead to step 3:
901 can be fit into 997 1 times, resulting in a remainder of 96.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 901 from 997 to get 96.
Bring next digit (9) of the dividend behind the 96 and repeat the process: 969 / 901

Advancing to step 4:
901 goes into 969 1 times with a remainder of 68.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 901 from 969 and we're left with 68.
Fetch the next digit (1) from the dividend, attach it to 68 and continue: 681 / 901

Step 5:
If we divide 681 by 901, we get 0 and a remainder of 681.
Put 0 as the next digit of the answer. 
Result so far: 110.0
Deduct 0 from 681 and we're left with 681.
Bring next digit (1) of the dividend behind the 681 and repeat the process: 6811 / 901

Advancing to step 6:
The number 901 fits into 6811 7 times, leaving a remainder of 504.
Use 7 as the next digit of our solution. 
Result so far: 1107.0
If we take 6307 away from 6811, we end up with 504.
Bring next digit (3) of the dividend behind the 504 and repeat the process: 5043 / 901

Going ahead to step 7:
If we divide 5043 by 901, we get 5 and a remainder of 538.
Put 5 as the next digit of the answer. 
Result so far: 11075.0
If we subtract 4505 from 5043, we get 538.
Take the next digit (8) from the dividend and append it to 538, then repeat: 5388 / 901

Let's proceed to step 8:
When dividing 5388 by 901, we get 5 with a remainder of 883.
The next digit of our result is 5. 
Result so far: 110755.0
Subtract 4505 from 5388 to get 883.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8830, and continue the process.

Going ahead to step 9:
901 can be fit into 8830 9 times, resulting in a remainder of 721.
The next digit of our result is 9. 
Result so far: 110755.9
Subtract 8109 from 8830 to get 721.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7210, and continue the process.

Step 10:
901 goes into 7210 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 110755.98
If we subtract 7208 from 7210, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
901 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 110755.98
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 12:
901 can be fit into 200 0 times, resulting in a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 110755.98
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 110755.98 with a remaining 0.002.