98607442 ÷ 90 
The aim is to understand the frequency of 90 in 98607442.

Let's proceed to step 1:
90 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 90

Going ahead to step 2:
When dividing 98 by 90, we get 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 8 after subtracting 90 from 98.
Bring next digit (6) of the dividend behind the 8 and repeat the process: 86 / 90

Let's proceed to step 3:
86 divided by 90 is 0 with a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 10.0
Subtracting 0 from 86 leaves us with 86.
Bring next digit (0) of the dividend behind the 86 and repeat the process: 860 / 90

Moving on to step 4:
The number 90 fits into 860 9 times, leaving a remainder of 50.
Record the quotient 9 as the next digit in the result. 
Result so far: 109.0
Deduct 810 from 860 and we're left with 50.
Take the next digit (7) from the dividend and append it to 50, then repeat: 507 / 90

Moving on to step 5:
If we divide 507 by 90, we get 5 and a remainder of 57.
The next digit of our result is 5. 
Result so far: 1095.0
If we take 450 away from 507, we end up with 57.
Append the next digit (4) from the dividend to 57 and continue with: 574 / 90

Let's proceed to step 6:
574 divided by 90 is 6 with a remainder of 34.
The next digit of our result is 6. 
Result so far: 10956.0
Deduct 540 from 574 and we're left with 34.
Fetch the next digit (4) from the dividend, attach it to 34 and continue: 344 / 90

On to step 7:
90 goes into 344 3 times with a remainder of 74.
Write down 3 as next digit of the result. 
Result so far: 109563.0
The remainder is 74 after subtracting 270 from 344.
Take the next digit (2) from the dividend and append it to 74, then repeat: 742 / 90

Advancing to step 8:
If we divide 742 by 90, we get 8 and a remainder of 22.
Use 8 as the next digit of our solution. 
Result so far: 1095638.0
Deduct 720 from 742 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 9:
The number 90 fits into 220 2 times, leaving a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 1095638.2
Deduct 180 from 220 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
If we divide 400 by 90, we get 4 and a remainder of 40.
The next digit of our result is 4. 
Result so far: 1095638.24
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 11:
The number 90 fits into 400 4 times, leaving a remainder of 40.
The next digit of our result is 4. 
Result so far: 1095638.244
If we take 360 away from 400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final result is 1095638.244 with a remainder of 0.004.