Let's divide 70921289 by 900
The aim is to understand the frequency of 900 in 70921289.

Going ahead to step 1:
When dividing 7 by 900, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (0) from the dividend, attach it to 7 and continue: 70 / 900

Step 2:
The number 900 fits into 70 0 times, leaving a remainder of 70.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 70, we end up with 70.
Include the next digit (9) from the dividend after 70, then repeat: 709 / 900

Let's proceed to step 3:
900 goes into 709 0 times with a remainder of 709.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 709 to get 709.
Fetch the next digit (2) from the dividend, attach it to 709 and continue: 7092 / 900

Step 4:
900 goes into 7092 7 times with a remainder of 792.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 6300 from 7092 to get 792.
Fetch the next digit (1) from the dividend, attach it to 792 and continue: 7921 / 900

Advancing to step 5:
The number 900 fits into 7921 8 times, leaving a remainder of 721.
Use 8 as the next digit of our solution. 
Result so far: 78.0
The remainder is 721 after subtracting 7200 from 7921.
Fetch the next digit (2) from the dividend, attach it to 721 and continue: 7212 / 900

Advancing to step 6:
The number 900 fits into 7212 8 times, leaving a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 788.0
Subtracting 7200 from 7212 leaves us with 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 900

Let's proceed to step 7:
When dividing 128 by 900, we get 0 with a remainder of 128.
The number 0 becomes the next digit in our result. 
Result so far: 7880.0
Subtracting 0 from 128 leaves us with 128.
Grab the next digit (9) from the dividend, add it to 128, then carry on: 1289 / 900

Let's proceed to step 8:
If we divide 1289 by 900, we get 1 and a remainder of 389.
Put 1 as the next digit of the answer. 
Result so far: 78801.0
Subtract 900 from 1289 to get 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

On to step 9:
900 goes into 3890 4 times with a remainder of 290.
The number 4 becomes the next digit in our result. 
Result so far: 78801.4
If we subtract 3600 from 3890, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 10:
900 goes into 2900 3 times with a remainder of 200.
The next digit of our result is 3. 
Result so far: 78801.43
If we subtract 2700 from 2900, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 11:
When dividing 2000 by 900, we get 2 with a remainder of 200.
The number 2 becomes the next digit in our result. 
Result so far: 78801.432
Deduct 1800 from 2000 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 12:
If we divide 2000 by 900, we get 2 and a remainder of 200.
Write down 2 as next digit of the result. 
Result so far: 78801.4322
Subtracting 1800 from 2000 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 78801.4322 with a remaining 0.002.