We're dividing 90455535 by 251 
The aim is to understand the frequency of 251 in 90455535.

Advancing to step 1:
251 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 251

Let's proceed to step 2:
If we divide 90 by 251, we get 0 and a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Fetch the next digit (4) from the dividend, attach it to 90 and continue: 904 / 251

Going ahead to step 3:
If we divide 904 by 251, we get 3 and a remainder of 151.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 151 after subtracting 753 from 904.
Include the next digit (5) from the dividend after 151, then repeat: 1515 / 251

Moving on to step 4:
251 goes into 1515 6 times with a remainder of 9.
The next digit of our result is 6. 
Result so far: 36.0
Subtracting 1506 from 1515 leaves us with 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 251

Moving on to step 5:
When dividing 95 by 251, we get 0 with a remainder of 95.
The next digit of our result is 0. 
Result so far: 360.0
Deduct 0 from 95 and we're left with 95.
Fetch the next digit (5) from the dividend, attach it to 95 and continue: 955 / 251

Moving on to step 6:
When dividing 955 by 251, we get 3 with a remainder of 202.
Put 3 as the next digit of the answer. 
Result so far: 3603.0
Subtract 753 from 955 to get 202.
Take the next digit (3) from the dividend and append it to 202, then repeat: 2023 / 251

Step 7:
2023 divided by 251 is 8 with a remainder of 15.
The next digit of our result is 8. 
Result so far: 36038.0
Subtract 2008 from 2023 to get 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 251

Step 8:
251 can be fit into 155 0 times, resulting in a remainder of 155.
Use 0 as the next digit of our solution. 
Result so far: 360380.0
If we take 0 away from 155, we end up with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 9:
The number 251 fits into 1550 6 times, leaving a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 360380.6
If we take 1506 away from 1550, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 10:
If we divide 440 by 251, we get 1 and a remainder of 189.
Write down 1 as next digit of the result. 
Result so far: 360380.61
If we take 251 away from 440, we end up with 189.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1890, and continue the process.

Advancing to step 11:
251 goes into 1890 7 times with a remainder of 133.
Record the quotient 7 as the next digit in the result. 
Result so far: 360380.617
If we subtract 1757 from 1890, we get 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Advancing to step 12:
1330 divided by 251 is 5 with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 360380.6175
The remainder is 75 after subtracting 1255 from 1330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 13:
251 goes into 750 2 times with a remainder of 248.
Use 2 as the next digit of our solution. 
Result so far: 360380.61752
The remainder is 248 after subtracting 502 from 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Let's proceed to step 14:
When dividing 2480 by 251, we get 9 with a remainder of 221.
Use 9 as the next digit of our solution. 
Result so far: 360380.617529
Subtract 2259 from 2480 to get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Let's proceed to step 15:
251 can be fit into 2210 8 times, resulting in a remainder of 202.
Record the quotient 8 as the next digit in the result. 
Result so far: 360380.6175298
If we take 2008 away from 2210, we end up with 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

On to step 16:
The number 251 fits into 2020 8 times, leaving a remainder of 12.
The next digit of our result is 8. 
Result so far: 360380.61752988
Subtract 2008 from 2020 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

In conclusion, the division gives 360380.61752988 with a balance of 1.2e-08.