We look at the division of 90122488 by 350 
The aim is to understand the frequency of 350 in 90122488.

Step 1:
350 can be fit into 9 0 times, resulting in a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 350

Going ahead to step 2:
If we divide 90 by 350, 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 (1) from the dividend, attach it to 90 and continue: 901 / 350

Moving on to step 3:
If we divide 901 by 350, we get 2 and a remainder of 201.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 700 away from 901, we end up with 201.
Take the next digit (2) from the dividend and append it to 201, then repeat: 2012 / 350

Going ahead to step 4:
350 can be fit into 2012 5 times, resulting in a remainder of 262.
Put 5 as the next digit of the answer. 
Result so far: 25.0
The remainder is 262 after subtracting 1750 from 2012.
Include the next digit (2) from the dividend after 262, then repeat: 2622 / 350

Going ahead to step 5:
When dividing 2622 by 350, we get 7 with a remainder of 172.
Write down 7 as next digit of the result. 
Result so far: 257.0
If we subtract 2450 from 2622, we get 172.
Fetch the next digit (4) from the dividend, attach it to 172 and continue: 1724 / 350

Moving on to step 6:
1724 divided by 350 is 4 with a remainder of 324.
The next digit of our result is 4. 
Result so far: 2574.0
Deduct 1400 from 1724 and we're left with 324.
Fetch the next digit (8) from the dividend, attach it to 324 and continue: 3248 / 350

Let's proceed to step 7:
350 goes into 3248 9 times with a remainder of 98.
Write down 9 as next digit of the result. 
Result so far: 25749.0
If we take 3150 away from 3248, we end up with 98.
Include the next digit (8) from the dividend after 98, then repeat: 988 / 350

Let's proceed to step 8:
The number 350 fits into 988 2 times, leaving a remainder of 288.
Record the quotient 2 as the next digit in the result. 
Result so far: 257492.0
Subtracting 700 from 988 leaves us with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Moving on to step 9:
When dividing 2880 by 350, we get 8 with a remainder of 80.
The next digit of our result is 8. 
Result so far: 257492.8
Subtract 2800 from 2880 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 10:
800 divided by 350 is 2 with a remainder of 100.
The next digit of our result is 2. 
Result so far: 257492.82
Subtract 700 from 800 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 11:
If we divide 1000 by 350, we get 2 and a remainder of 300.
The next digit of our result is 2. 
Result so far: 257492.822
Subtracting 700 from 1000 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

The final outcome is 257492.822, with a leftover of 0.03.