55346901 ÷ 638 
The aim is to understand the frequency of 638 in 55346901.

Advancing to step 1:
The number 638 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 638

Moving on to step 2:
638 can be fit into 55 0 times, resulting in a remainder of 55.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 55 leaves us with 55.
Append the next digit (3) from the dividend to 55 and continue with: 553 / 638

On to step 3:
If we divide 553 by 638, we get 0 and a remainder of 553.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 553, we get 553.
Take the next digit (4) from the dividend and append it to 553, then repeat: 5534 / 638

Step 4:
The number 638 fits into 5534 8 times, leaving a remainder of 430.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtract 5104 from 5534 to get 430.
Take the next digit (6) from the dividend and append it to 430, then repeat: 4306 / 638

Going ahead to step 5:
The number 638 fits into 4306 6 times, leaving a remainder of 478.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
The remainder is 478 after subtracting 3828 from 4306.
Take the next digit (9) from the dividend and append it to 478, then repeat: 4789 / 638

Let's proceed to step 6:
When dividing 4789 by 638, we get 7 with a remainder of 323.
Put 7 as the next digit of the answer. 
Result so far: 867.0
Subtract 4466 from 4789 to get 323.
Bring next digit (0) of the dividend behind the 323 and repeat the process: 3230 / 638

On to step 7:
638 goes into 3230 5 times with a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 8675.0
If we take 3190 away from 3230, we end up with 40.
Take the next digit (1) from the dividend and append it to 40, then repeat: 401 / 638

Let's proceed to step 8:
When dividing 401 by 638, we get 0 with a remainder of 401.
Record the quotient 0 as the next digit in the result. 
Result so far: 86750.0
Subtract 0 from 401 to get 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Advancing to step 9:
If we divide 4010 by 638, we get 6 and a remainder of 182.
Use 6 as the next digit of our solution. 
Result so far: 86750.6
Subtract 3828 from 4010 to get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Let's proceed to step 10:
If we divide 1820 by 638, we get 2 and a remainder of 544.
The next digit of our result is 2. 
Result so far: 86750.62
Subtracting 1276 from 1820 leaves us with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Going ahead to step 11:
When dividing 5440 by 638, we get 8 with a remainder of 336.
The next digit of our result is 8. 
Result so far: 86750.628
Subtract 5104 from 5440 to get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Moving on to step 12:
The number 638 fits into 3360 5 times, leaving a remainder of 170.
The number 5 becomes the next digit in our result. 
Result so far: 86750.6285
Subtracting 3190 from 3360 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 13:
If we divide 1700 by 638, we get 2 and a remainder of 424.
Put 2 as the next digit of the answer. 
Result so far: 86750.62852
Deduct 1276 from 1700 and we're left with 424.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Advancing to step 14:
638 can be fit into 4240 6 times, resulting in a remainder of 412.
Write down 6 as next digit of the result. 
Result so far: 86750.628526
If we subtract 3828 from 4240, we get 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

On to step 15:
When dividing 4120 by 638, we get 6 with a remainder of 292.
Record the quotient 6 as the next digit in the result. 
Result so far: 86750.6285266
Subtract 3828 from 4120 to get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

After the division, we end up with 86750.6285266 and a remainder of 2.92e-06.