35853540 ÷ 903 
The aim is to understand the frequency of 903 in 35853540.

Step 1:
The number 903 fits into 3 0 times, leaving a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 903

On to step 2:
903 can be fit into 35 0 times, resulting in a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Include the next digit (8) from the dividend after 35, then repeat: 358 / 903

Moving on to step 3:
903 can be fit into 358 0 times, resulting in a remainder of 358.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 358, we end up with 358.
Include the next digit (5) from the dividend after 358, then repeat: 3585 / 903

Let's proceed to step 4:
The number 903 fits into 3585 3 times, leaving a remainder of 876.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 2709 from 3585 to get 876.
Grab the next digit (3) from the dividend, add it to 876, then carry on: 8763 / 903

Let's proceed to step 5:
When dividing 8763 by 903, we get 9 with a remainder of 636.
The next digit of our result is 9. 
Result so far: 39.0
If we take 8127 away from 8763, we end up with 636.
Bring next digit (5) of the dividend behind the 636 and repeat the process: 6365 / 903

Step 6:
The number 903 fits into 6365 7 times, leaving a remainder of 44.
Use 7 as the next digit of our solution. 
Result so far: 397.0
If we take 6321 away from 6365, we end up with 44.
Grab the next digit (4) from the dividend, add it to 44, then carry on: 444 / 903

Moving on to step 7:
When dividing 444 by 903, we get 0 with a remainder of 444.
The number 0 becomes the next digit in our result. 
Result so far: 3970.0
If we take 0 away from 444, we end up with 444.
Grab the next digit (0) from the dividend, add it to 444, then carry on: 4440 / 903

On to step 8:
903 goes into 4440 4 times with a remainder of 828.
Put 4 as the next digit of the answer. 
Result so far: 39704.0
Subtract 3612 from 4440 to get 828.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8280, and continue the process.

Let's proceed to step 9:
When dividing 8280 by 903, we get 9 with a remainder of 153.
The next digit of our result is 9. 
Result so far: 39704.9
Subtract 8127 from 8280 to get 153.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

On to step 10:
If we divide 1530 by 903, we get 1 and a remainder of 627.
The number 1 becomes the next digit in our result. 
Result so far: 39704.91
If we take 903 away from 1530, we end up with 627.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6270, and continue the process.

On to step 11:
If we divide 6270 by 903, we get 6 and a remainder of 852.
Record the quotient 6 as the next digit in the result. 
Result so far: 39704.916
If we take 5418 away from 6270, we end up with 852.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8520, and continue the process.

Moving on to step 12:
903 can be fit into 8520 9 times, resulting in a remainder of 393.
Put 9 as the next digit of the answer. 
Result so far: 39704.9169
If we take 8127 away from 8520, we end up with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Moving on to step 13:
When dividing 3930 by 903, we get 4 with a remainder of 318.
Use 4 as the next digit of our solution. 
Result so far: 39704.91694
Deduct 3612 from 3930 and we're left with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Advancing to step 14:
903 goes into 3180 3 times with a remainder of 471.
Use 3 as the next digit of our solution. 
Result so far: 39704.916943
If we take 2709 away from 3180, we end up with 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

Going ahead to step 15:
When dividing 4710 by 903, we get 5 with a remainder of 195.
Put 5 as the next digit of the answer. 
Result so far: 39704.9169435
Subtract 4515 from 4710 to get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 16:
The number 903 fits into 1950 2 times, leaving a remainder of 144.
Put 2 as the next digit of the answer. 
Result so far: 39704.91694352
Deduct 1806 from 1950 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The final outcome is 39704.91694352, with a leftover of 1.44e-07.