Let's divide 90420065 by 901
The aim is to understand the frequency of 901 in 90420065.

On to step 1:
901 can be fit into 9 0 times, resulting in a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 901

Going ahead to step 2:
If we divide 90 by 901, we get 0 and a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 90, we get 90.
Include the next digit (4) from the dividend after 90, then repeat: 904 / 901

Moving on to step 3:
When dividing 904 by 901, we get 1 with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 901 from 904, we get 3.
Fetch the next digit (2) from the dividend, attach it to 3 and continue: 32 / 901

Advancing to step 4:
When dividing 32 by 901, we get 0 with a remainder of 32.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we take 0 away from 32, we end up with 32.
Include the next digit (0) from the dividend after 32, then repeat: 320 / 901

Let's proceed to step 5:
If we divide 320 by 901, we get 0 and a remainder of 320.
Record the quotient 0 as the next digit in the result. 
Result so far: 100.0
Subtract 0 from 320 to get 320.
Bring next digit (0) of the dividend behind the 320 and repeat the process: 3200 / 901

On to step 6:
The number 901 fits into 3200 3 times, leaving a remainder of 497.
Use 3 as the next digit of our solution. 
Result so far: 1003.0
If we subtract 2703 from 3200, we get 497.
Bring next digit (6) of the dividend behind the 497 and repeat the process: 4976 / 901

Step 7:
The number 901 fits into 4976 5 times, leaving a remainder of 471.
The number 5 becomes the next digit in our result. 
Result so far: 10035.0
If we take 4505 away from 4976, we end up with 471.
Include the next digit (5) from the dividend after 471, then repeat: 4715 / 901

Going ahead to step 8:
901 goes into 4715 5 times with a remainder of 210.
Use 5 as the next digit of our solution. 
Result so far: 100355.0
Subtract 4505 from 4715 to get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 9:
901 goes into 2100 2 times with a remainder of 298.
Put 2 as the next digit of the answer. 
Result so far: 100355.2
If we take 1802 away from 2100, we end up with 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Let's proceed to step 10:
901 can be fit into 2980 3 times, resulting in a remainder of 277.
Use 3 as the next digit of our solution. 
Result so far: 100355.23
Deduct 2703 from 2980 and we're left with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Advancing to step 11:
2770 divided by 901 is 3 with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 100355.233
If we subtract 2703 from 2770, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

The quotient of the division is 100355.233, and the remainder is 0.0067.