We're dividing 3427687 by 903 
The aim is to understand the frequency of 903 in 3427687.

Going ahead to step 1:
903 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 903

Advancing to step 2:
903 can be fit into 34 0 times, resulting in a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 34 to get 34.
Take the next digit (2) from the dividend and append it to 34, then repeat: 342 / 903

Going ahead to step 3:
342 divided by 903 is 0 with a remainder of 342.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 342 to get 342.
Include the next digit (7) from the dividend after 342, then repeat: 3427 / 903

On to step 4:
When dividing 3427 by 903, we get 3 with a remainder of 718.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 2709 from 3427 and we're left with 718.
Bring next digit (6) of the dividend behind the 718 and repeat the process: 7186 / 903

Advancing to step 5:
7186 divided by 903 is 7 with a remainder of 865.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtract 6321 from 7186 to get 865.
Grab the next digit (8) from the dividend, add it to 865, then carry on: 8658 / 903

On to step 6:
903 goes into 8658 9 times with a remainder of 531.
The next digit of our result is 9. 
Result so far: 379.0
If we take 8127 away from 8658, we end up with 531.
Take the next digit (7) from the dividend and append it to 531, then repeat: 5317 / 903

Advancing to step 7:
When dividing 5317 by 903, we get 5 with a remainder of 802.
The next digit of our result is 5. 
Result so far: 3795.0
Deduct 4515 from 5317 and we're left with 802.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8020, and continue the process.

Step 8:
The number 903 fits into 8020 8 times, leaving a remainder of 796.
The next digit of our result is 8. 
Result so far: 3795.8
The remainder is 796 after subtracting 7224 from 8020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

Advancing to step 9:
903 can be fit into 7960 8 times, resulting in a remainder of 736.
Put 8 as the next digit of the answer. 
Result so far: 3795.88
Subtract 7224 from 7960 to get 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

The final outcome is 3795.88, with a leftover of 0.736.