Let's divide 901390 by 10
The aim is to understand the frequency of 10 in 901390.

Advancing to step 1:
10 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 10

Step 2:
10 goes into 90 9 times with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 9.0
If we take 90 away from 90, we end up with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 10

Let's proceed to step 3:
If we divide 1 by 10, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 90.0
If we take 0 away from 1, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 10

Advancing to step 4:
13 divided by 10 is 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 901.0
If we take 10 away from 13, we end up with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 10

On to step 5:
The number 10 fits into 39 3 times, leaving a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 9013.0
Subtract 30 from 39 to get 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 10

Going ahead to step 6:
10 can be fit into 90 9 times, resulting in a remainder of 0.
The next digit of our result is 9. 
Result so far: 90139.0
Subtract 90 from 90 to 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 7:
If we divide 0 by 10, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 90139.0
If we take 0 away from 0, we end up 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.

Advancing to step 8:
0 divided by 10 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 90139.0
Deduct 0 from 0 and we're left 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 90139.0 and a remainder of 0.0.