We look at the division of 12268451 by 401 
The aim is to understand the frequency of 401 in 12268451.

Moving on to step 1:
401 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 401

Moving on to step 2:
401 goes into 12 0 times with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 401

Step 3:
401 goes into 122 0 times with a remainder of 122.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 122, we end up with 122.
Append the next digit (6) from the dividend to 122 and continue with: 1226 / 401

Let's proceed to step 4:
If we divide 1226 by 401, we get 3 and a remainder of 23.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 1203 from 1226 and we're left with 23.
Include the next digit (8) from the dividend after 23, then repeat: 238 / 401

Advancing to step 5:
When dividing 238 by 401, we get 0 with a remainder of 238.
Use 0 as the next digit of our solution. 
Result so far: 30.0
If we subtract 0 from 238, we get 238.
Take the next digit (4) from the dividend and append it to 238, then repeat: 2384 / 401

On to step 6:
401 can be fit into 2384 5 times, resulting in a remainder of 379.
Write down 5 as next digit of the result. 
Result so far: 305.0
Subtract 2005 from 2384 to get 379.
Take the next digit (5) from the dividend and append it to 379, then repeat: 3795 / 401

Step 7:
If we divide 3795 by 401, we get 9 and a remainder of 186.
Record the quotient 9 as the next digit in the result. 
Result so far: 3059.0
If we subtract 3609 from 3795, we get 186.
Append the next digit (1) from the dividend to 186 and continue with: 1861 / 401

Advancing to step 8:
401 goes into 1861 4 times with a remainder of 257.
Use 4 as the next digit of our solution. 
Result so far: 30594.0
Subtract 1604 from 1861 to get 257.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2570, and continue the process.

Going ahead to step 9:
The number 401 fits into 2570 6 times, leaving a remainder of 164.
Use 6 as the next digit of our solution. 
Result so far: 30594.6
If we subtract 2406 from 2570, we get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Going ahead to step 10:
When dividing 1640 by 401, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 30594.64
Subtract 1604 from 1640 to get 36.
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:
360 divided by 401 is 0 with a remainder of 360.
Put 0 as the next digit of the answer. 
Result so far: 30594.64
Subtract 0 from 360 to get 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 401 fits into 3600 8 times, leaving a remainder of 392.
Record the quotient 8 as the next digit in the result. 
Result so far: 30594.6408
The remainder is 392 after subtracting 3208 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

Let's proceed to step 13:
The number 401 fits into 3920 9 times, leaving a remainder of 311.
Put 9 as the next digit of the answer. 
Result so far: 30594.64089
Subtract 3609 from 3920 to get 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Going ahead to step 14:
401 goes into 3110 7 times with a remainder of 303.
The next digit of our result is 7. 
Result so far: 30594.640897
Subtracting 2807 from 3110 leaves us with 303.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3030, and continue the process.

Going ahead to step 15:
401 goes into 3030 7 times with a remainder of 223.
The next digit of our result is 7. 
Result so far: 30594.6408977
If we subtract 2807 from 3030, we get 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

In conclusion, the division gives 30594.6408977 with a balance of 2.23e-06.