We divide 693442 by 90
The aim is to understand the frequency of 90 in 693442.

Let's proceed to step 1:
90 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 90

Going ahead to step 2:
When dividing 69 by 90, we get 0 with a remainder of 69.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 69 leaves us with 69.
Append the next digit (3) from the dividend to 69 and continue with: 693 / 90

Let's proceed to step 3:
If we divide 693 by 90, we get 7 and a remainder of 63.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 630 from 693 to get 63.
Grab the next digit (4) from the dividend, add it to 63, then carry on: 634 / 90

Let's proceed to step 4:
90 can be fit into 634 7 times, resulting in a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Subtract 630 from 634 to get 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 90

Advancing to step 5:
When dividing 44 by 90, we get 0 with a remainder of 44.
Write down 0 as next digit of the result. 
Result so far: 770.0
If we subtract 0 from 44, we get 44.
Take the next digit (2) from the dividend and append it to 44, then repeat: 442 / 90

Let's proceed to step 6:
When dividing 442 by 90, we get 4 with a remainder of 82.
Write down 4 as next digit of the result. 
Result so far: 7704.0
If we take 360 away from 442, we end up with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Step 7:
The number 90 fits into 820 9 times, leaving a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 7704.9
The remainder is 10 after subtracting 810 from 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
100 divided by 90 is 1 with a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 7704.91
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
If we divide 100 by 90, we get 1 and a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 7704.911
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 7704.911 with a remainder of 0.001.