We look at the division of 90052069 by 355 
The aim is to understand the frequency of 355 in 90052069.

Step 1:
9 divided by 355 is 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 355

Going ahead to step 2:
90 divided by 355 is 0 with a remainder of 90.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 90 after subtracting 0 from 90.
Append the next digit (0) from the dividend to 90 and continue with: 900 / 355

Let's proceed to step 3:
The number 355 fits into 900 2 times, leaving a remainder of 190.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 710 away from 900, we end up with 190.
Bring next digit (5) of the dividend behind the 190 and repeat the process: 1905 / 355

On to step 4:
1905 divided by 355 is 5 with a remainder of 130.
Use 5 as the next digit of our solution. 
Result so far: 25.0
Subtract 1775 from 1905 to get 130.
Fetch the next digit (2) from the dividend, attach it to 130 and continue: 1302 / 355

Let's proceed to step 5:
355 goes into 1302 3 times with a remainder of 237.
Record the quotient 3 as the next digit in the result. 
Result so far: 253.0
Deduct 1065 from 1302 and we're left with 237.
Include the next digit (0) from the dividend after 237, then repeat: 2370 / 355

Advancing to step 6:
355 can be fit into 2370 6 times, resulting in a remainder of 240.
Use 6 as the next digit of our solution. 
Result so far: 2536.0
If we take 2130 away from 2370, we end up with 240.
Bring next digit (6) of the dividend behind the 240 and repeat the process: 2406 / 355

Let's proceed to step 7:
355 can be fit into 2406 6 times, resulting in a remainder of 276.
Write down 6 as next digit of the result. 
Result so far: 25366.0
The remainder is 276 after subtracting 2130 from 2406.
Append the next digit (9) from the dividend to 276 and continue with: 2769 / 355

On to step 8:
If we divide 2769 by 355, we get 7 and a remainder of 284.
The next digit of our result is 7. 
Result so far: 253667.0
If we take 2485 away from 2769, we end up with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 9:
If we divide 2840 by 355, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 253667.8
If we subtract 2840 from 2840, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
355 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 253667.8
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
355 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 253667.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 253667.8 and a remainder of 0.0.