We're dividing 78423059 by 901 
The aim is to understand the frequency of 901 in 78423059.

On to step 1:
901 goes into 7 0 times with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 901

On to step 2:
78 divided by 901 is 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Bring next digit (4) of the dividend behind the 78 and repeat the process: 784 / 901

Advancing to step 3:
901 goes into 784 0 times with a remainder of 784.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 784 and we're left with 784.
Grab the next digit (2) from the dividend, add it to 784, then carry on: 7842 / 901

Let's proceed to step 4:
901 goes into 7842 8 times with a remainder of 634.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 7208 from 7842, we get 634.
Append the next digit (3) from the dividend to 634 and continue with: 6343 / 901

Advancing to step 5:
When dividing 6343 by 901, we get 7 with a remainder of 36.
Record the quotient 7 as the next digit in the result. 
Result so far: 87.0
The remainder is 36 after subtracting 6307 from 6343.
Append the next digit (0) from the dividend to 36 and continue with: 360 / 901

Advancing to step 6:
If we divide 360 by 901, we get 0 and a remainder of 360.
Use 0 as the next digit of our solution. 
Result so far: 870.0
If we subtract 0 from 360, we get 360.
Fetch the next digit (5) from the dividend, attach it to 360 and continue: 3605 / 901

Going ahead to step 7:
When dividing 3605 by 901, we get 4 with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 8704.0
If we take 3604 away from 3605, we end up with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 901

Advancing to step 8:
901 goes into 19 0 times with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 87040.0
Deduct 0 from 19 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 9:
When dividing 190 by 901, we get 0 with a remainder of 190.
Use 0 as the next digit of our solution. 
Result so far: 87040.0
Deduct 0 from 190 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 10:
901 goes into 1900 2 times with a remainder of 98.
Write down 2 as next digit of the result. 
Result so far: 87040.02
Subtracting 1802 from 1900 leaves us with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Step 11:
980 divided by 901 is 1 with a remainder of 79.
The next digit of our result is 1. 
Result so far: 87040.021
If we take 901 away from 980, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 12:
The number 901 fits into 790 0 times, leaving a remainder of 790.
Write down 0 as next digit of the result. 
Result so far: 87040.021
Subtract 0 from 790 to get 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7900, and continue the process.

Step 13:
If we divide 7900 by 901, we get 8 and a remainder of 692.
Write down 8 as next digit of the result. 
Result so far: 87040.02108
The remainder is 692 after subtracting 7208 from 7900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6920, and continue the process.

Step 14:
901 can be fit into 6920 7 times, resulting in a remainder of 613.
The next digit of our result is 7. 
Result so far: 87040.021087
Deduct 6307 from 6920 and we're left with 613.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6130, and continue the process.

Let's proceed to step 15:
If we divide 6130 by 901, we get 6 and a remainder of 724.
Write down 6 as next digit of the result. 
Result so far: 87040.0210876
If we subtract 5406 from 6130, we get 724.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Advancing to step 16:
If we divide 7240 by 901, we get 8 and a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 87040.02108768
Subtracting 7208 from 7240 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

In conclusion, the division gives 87040.02108768 with a balance of 3.2e-08.