We're dividing 3451503 by 637 
The aim is to understand the frequency of 637 in 3451503.

On to step 1:
3 divided by 637 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 637

On to step 2:
When dividing 34 by 637, we get 0 with a remainder of 34.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 34 to get 34.
Bring next digit (5) of the dividend behind the 34 and repeat the process: 345 / 637

On to step 3:
345 divided by 637 is 0 with a remainder of 345.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 345, we get 345.
Grab the next digit (1) from the dividend, add it to 345, then carry on: 3451 / 637

Moving on to step 4:
When dividing 3451 by 637, we get 5 with a remainder of 266.
The next digit of our result is 5. 
Result so far: 5.0
Subtract 3185 from 3451 to get 266.
Append the next digit (5) from the dividend to 266 and continue with: 2665 / 637

Going ahead to step 5:
2665 divided by 637 is 4 with a remainder of 117.
The number 4 becomes the next digit in our result. 
Result so far: 54.0
Subtracting 2548 from 2665 leaves us with 117.
Append the next digit (0) from the dividend to 117 and continue with: 1170 / 637

Step 6:
637 goes into 1170 1 times with a remainder of 533.
Put 1 as the next digit of the answer. 
Result so far: 541.0
Deduct 637 from 1170 and we're left with 533.
Include the next digit (3) from the dividend after 533, then repeat: 5333 / 637

Going ahead to step 7:
If we divide 5333 by 637, we get 8 and a remainder of 237.
Write down 8 as next digit of the result. 
Result so far: 5418.0
Subtracting 5096 from 5333 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Moving on to step 8:
637 can be fit into 2370 3 times, resulting in a remainder of 459.
Record the quotient 3 as the next digit in the result. 
Result so far: 5418.3
Subtracting 1911 from 2370 leaves us with 459.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4590, and continue the process.

Step 9:
637 can be fit into 4590 7 times, resulting in a remainder of 131.
Write down 7 as next digit of the result. 
Result so far: 5418.37
Subtract 4459 from 4590 to get 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Let's proceed to step 10:
1310 divided by 637 is 2 with a remainder of 36.
Record the quotient 2 as the next digit in the result. 
Result so far: 5418.372
The remainder is 36 after subtracting 1274 from 1310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 11:
637 goes into 360 0 times with a remainder of 360.
Write down 0 as next digit of the result. 
Result so far: 5418.372
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 12:
The number 637 fits into 3600 5 times, leaving a remainder of 415.
Put 5 as the next digit of the answer. 
Result so far: 5418.37205
If we take 3185 away from 3600, we end up with 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Advancing to step 13:
When dividing 4150 by 637, we get 6 with a remainder of 328.
The number 6 becomes the next digit in our result. 
Result so far: 5418.372056
Subtracting 3822 from 4150 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Moving on to step 14:
637 goes into 3280 5 times with a remainder of 95.
Write down 5 as next digit of the result. 
Result so far: 5418.3720565
Subtracting 3185 from 3280 leaves us with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 15:
The number 637 fits into 950 1 times, leaving a remainder of 313.
The number 1 becomes the next digit in our result. 
Result so far: 5418.37205651
Deduct 637 from 950 and we're left with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

The final outcome is 5418.37205651, with a leftover of 3.13e-07.