Let's divide 77651161 by 90
The aim is to understand the frequency of 90 in 77651161.

Moving on to step 1:
7 divided by 90 is 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (7) of the dividend behind the 7 and repeat the process: 77 / 90

Step 2:
If we divide 77 by 90, we get 0 and a remainder of 77.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Fetch the next digit (6) from the dividend, attach it to 77 and continue: 776 / 90

Advancing to step 3:
90 goes into 776 8 times with a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
The remainder is 56 after subtracting 720 from 776.
Grab the next digit (5) from the dividend, add it to 56, then carry on: 565 / 90

Moving on to step 4:
90 can be fit into 565 6 times, resulting in a remainder of 25.
Put 6 as the next digit of the answer. 
Result so far: 86.0
If we subtract 540 from 565, we get 25.
Include the next digit (1) from the dividend after 25, then repeat: 251 / 90

On to step 5:
If we divide 251 by 90, we get 2 and a remainder of 71.
Record the quotient 2 as the next digit in the result. 
Result so far: 862.0
Subtracting 180 from 251 leaves us with 71.
Include the next digit (1) from the dividend after 71, then repeat: 711 / 90

Step 6:
If we divide 711 by 90, we get 7 and a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 8627.0
Subtract 630 from 711 to get 81.
Take the next digit (6) from the dividend and append it to 81, then repeat: 816 / 90

Let's proceed to step 7:
90 can be fit into 816 9 times, resulting in a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 86279.0
Subtract 810 from 816 to get 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 90

Going ahead to step 8:
90 goes into 61 0 times with a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 862790.0
Subtract 0 from 61 to get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 9:
The number 90 fits into 610 6 times, leaving a remainder of 70.
Record the quotient 6 as the next digit in the result. 
Result so far: 862790.6
Subtract 540 from 610 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 10:
If we divide 700 by 90, we get 7 and a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 862790.67
If we subtract 630 from 700, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 11:
700 divided by 90 is 7 with a remainder of 70.
Use 7 as the next digit of our solution. 
Result so far: 862790.677
Deduct 630 from 700 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The quotient of the division is 862790.677, and the remainder is 0.007.