We're dividing 2071353 by 90 
The aim is to understand the frequency of 90 in 2071353.

Step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 90

Let's proceed to step 2:
90 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Append the next digit (7) from the dividend to 20 and continue with: 207 / 90

On to step 3:
If we divide 207 by 90, we get 2 and a remainder of 27.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 180 from 207 and we're left with 27.
Take the next digit (1) from the dividend and append it to 27, then repeat: 271 / 90

Let's proceed to step 4:
90 can be fit into 271 3 times, resulting in a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Deduct 270 from 271 and we're left with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 90

Let's proceed to step 5:
90 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 230.0
The remainder is 13 after subtracting 0 from 13.
Grab the next digit (5) from the dividend, add it to 13, then carry on: 135 / 90

Step 6:
When dividing 135 by 90, we get 1 with a remainder of 45.
Record the quotient 1 as the next digit in the result. 
Result so far: 2301.0
If we take 90 away from 135, we end up with 45.
Fetch the next digit (3) from the dividend, attach it to 45 and continue: 453 / 90

Step 7:
453 divided by 90 is 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 23015.0
Deduct 450 from 453 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 8:
30 divided by 90 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 23015.0
Subtract 0 from 30 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
300 divided by 90 is 3 with a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 23015.03
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 10:
300 divided by 90 is 3 with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 23015.033
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 23015.033 and a remainder of 0.003.